Big Jim/Enlarged Downpipe

[chezzer85]

I have enquired about getting a few of these made up at a local engineering ferm. Copying one of Jims Pipes. Before i take this any further i would like to know how much interest there is in these as not economical to make up less than 5.

Estimated cost for 5 downpipes would be £90-£100 meterials plus £100-£110 labour.
Bit cheaper for more than 5, Please let me know if your interested before i take this any further.

[Brizza]

yes but I'd want a 3" pipe making up with a few changes...

[steer from the rear]

yes but I'd want a 3" pipe making up with a few changes...

3" bloody hell what you running 500 bhp :smokin:

[Brizza]

mine goes to 3" about 6" further down, I want a swan neck / bellmouth adaptor making up that goes straight to 3" from the bell mouth

[steer from the rear]

So is that the Exducer bore and internal gate separating internally in a 90 degree elbow then going into 3" or am way off the mark here?

[Brizza]

Did you get the pics? I think a standard 3"pipe going from the exhaust wheel with another smaller 1-1.5" pipe grafted on runing along side the main pipe which eventually disolves into the 3" pipe? and yeah did yousee the drawings i sent ya? :cool:

[mike's r5]

i would b interested in one of these. mike

[Brizza]

ps exducer blade and wastgate neednt be divorced at all... thats just an option, i hadnt really thought that to be neccesary.... I'm sure people with more knowledge of fluid systems/gas movement will correct me..... KD? IanS? :)

[Matt Cole]

ps exducer blade and wastgate neednt be divorced at all... thats just an option, i hadnt really thought that to be neccesary.... I'm sure people with more knowledge of fluid systems/gas movement will correct me..... KD? IanS? :)

All I know Brizzi is you've got 3" and I've got two feet! :ashamed:

[chezzer85]

Brizza just had look at your pics, i like the idear and see where your coming from. However this is a very custom job, and i think if i was to ask these guys to make one up they might not be to keen to just make a one off. You'd be looking at shelling out a huge wedge say £500-£600. If your still keen and not worried about the cost drop me a PM and i'll take your pics in for them to have a look.

[GTphil]

As much as I would like one, cash needs to be spent on other things at the moment. Top darts for sorting out a group buy:agree:

[Ian S]

Not trying to spoil your idea but Big Jim is still making these and CGB just ordered a load of them from him.

Apparently the CGB retail price is £200. I haven't checked that.

Big Jim just told me that he's not accepting orders direct from customers now and has agreed CGB to be the sole distributor of these downpipes.

[chezzer85]

Ok thought he wasn't doing them any more, saves me time and effort then.

[Brizza]

I'll have to get on to him about it, mights slightly diff as the coupling is under the car on mine

[steer from the rear]

Did you get the pics? I think a standard 3"pipe going from the exhaust wheel with another smaller 1-1.5" pipe grafted on runing along side the main pipe which eventually disolves into the 3" pipe? and yeah did yousee the drawings i sent ya? :cool:

Like this one I'm half way through making :

http://i277.photobucket.com/albums/kk55/steer_from_the_rear1985/875f8e4d.jpg

[Brizza]

That does look sweet, what diameters are the pipes your using?

[dave_gtt]

Not trying to spoil your idea but Big Jim is still making these and CGB just ordered a load of them from him.

Apparently the CGB retail price is £200. I haven't checked that.

I anyone wants one direct from Big Jim then just send him an email. clinchmotorsport@gmail.com I don't know what the pricing is.

That's good news i've been after one of these for ages.:agree:

[steer from the rear]

That does look sweet, what diameters are the pipes your using?

2" exducer and 1.25" dump pipe which would run into a 2.5 or 3 " system. Ive flanges and conical adaprtors to make any manifold and downpipe......... The wonders of working at a food grade tig company, any pipe any bend all in one place

[Brizza]

2" exducer and 1.25" dump pipe which would run into a 2.5 or 3 " system. Ive flanges and conical adaprtors to make any manifold and downpipe......... The wonders of working at a food grade tig company, any pipe any bend all in one place


I've been reading a lot into Pros/Cons of Bellmouths vs twin pipes etc and now am utterly confusssled!!! :crap:

[Brizza]

I've been reading a lot into Pros/Cons of Bellmouths vs twin pipes etc and now am utterly confusssled!!! :crap:


http://www.iwsti.com/forums/2-5-liter-litre-factory-motor/78808-divorced-vs-bellmouth.html

[steer from the rear]

I'd. Think the price difference vs the actual hp gain would point to the easiest to manufacture

[Ian S]

Big Jim just told me that he's not accepting orders direct from customers now and has agreed CGB to be the sole distributor of these downpipes.

[tubbyG]

I expect them to be snapped up pretty quickly, although I dread to think of the price these will be sold for...... did Jim mention how many units will be made up?

[dave_gtt]

Big Jim just told me that he's not accepting orders direct from customers now and has agreed CGB to be the sole distributor of these downpipes.

He did'nt mention when they will be available did he??:agree:

[Ian S]

It seems that Jim is making them on-going.

Best to ask CGB if he already has some to sell. Maybe CGB will make a list and sell them in order.

[Brigsy]

Fitment of my big jim downpipe was poor before i modified it, hope there better now for the price. The flange that mates up with the exhaust housing was badly warped.

[steer from the rear]

Fitment of my big jim downpipe was poor before i modified it, hope there better now for the price. The flange that mates up with the exhaust housing was badly warped.

You thought it would be faced after welding, not surprised its warped from the heat welding it though

[chezzer85]

http://www.cgbmotorsport.net/exhaust-2-12-stainless-steel-down--cross-over-pipe-988-p.asp are these the same pipes

[Brigsy]

Nope thats just a downpipe that bolts to the o.e cast elbow

[GTphil]

Probably end up costing well over 200 notes I would have thought:crap:

[steer from the rear]

Probably end up costing well over 200 notes I would have thought:crap:

Correct I've done some snooping....... Rang bob lol 200+vat+delivery so call it £260, they can be made cheaper. :D

[chezzer85]

Correct I've done some snooping....... Rang bob lol 200+vat+delivery so call it £260, they can be made cheaper. :D

Thats quite dear, My R5's booked in for a respray and turbos probably gonna have to be sent away for a rebuild, so i have no use for my Big Jim Pipe for the next few weeks. So can be used to make the jig for some more if anyones interested.

[chezzer85]

Fitment of my big jim downpipe was poor before i modified it, hope there better now for the price. The flange that mates up with the exhaust housing was badly warped.

I know mines a one of Jim prototypes but MGC Engineering where i can get some more made did say they thought it was badly finished.

[Brizza]

Thats quite dear, My R5's booked in for a respray and turbos probably gonna have to be sent away for a rebuild, so i have no use for my Big Jim Pipe for the next few weeks. So can be used to make the jig for some more if anyones interested.


I would be if thats ok? I'd get it posted back as soon as i get some solidworks drawings made up of it? :)

[Ian S]

Correct I've done some snooping....... Rang bob lol 200+vat+delivery so call it £260, they can be made cheaper. :DMy mistake to presume that was going to be £200 inc VAT. I did say I hadn't checked. I think Jim was selling them direct for about £150 (+ post?) wasn't he?
Estimated cost for 5 downpipes would be £90-£100 meterials plus £100-£110 labour.Was your quote also without VAT? And would be + postage to buyers. So would be the same price more or less.
they can be made cheaper.Obviously, Jim makes them cheaper. Can they be SOLD cheaper, inc VAT and POST is the question. Are you suggesting you'll do the members a favour and make and sell at no profit? Or at least, a small one? And deal direct with, and post to, each member?

Jim has the flanges made for him (laser cut?) so they are all the same and high quality. I can't comment on new ones vs. warped old ones as I've not looked for that on a recent one. Nor old ones. For the last few years he's owned a MUCH better tig that he used to use. If I recall correctly, £5000 or so it cost, and the welding it does / allows him to do, is better. I don't know if that affects warping or if he does flatten the end these days.

[5teve L]

I wonder if CGB will see a downpipe ready for use before 2013 though, Jim isn't exactly quick these days is he....

[dangerous dave]

Big jim won't be making rtoc any if he's sorting cgb out, that would pi55 cgb right off and he gets a lot of traffic through his site, I bet he sells them no problem.

[chezzer85]

I'm 90% sure the prices i have been quoted are including VAT will ring and double check. I'm only doing this as favor to fellow members, wasn't planning to make anyting on it myself. I have already got one of Jims pipes so wont be after one myself, unless they turn out heaps better.

Don't want to be doing this on a regular basis though, if i get enough people interested, we'll draw up a list. I'll then get a batch made up and posted out in one go to peeps on payment, might ask for a small deposit.

[Ian S]

might ask for a small deposit.I strongly recommend asking for full payment up front. Or you'll be left with a few.

And I would expect you'd need to demonstrate the quality before anyone will pay up. As we did with the Raceland manifolds group buy.

[chezzer85]

The turn around might not be that quick as to quote Tom the owner of this engineering ferm " the wheels of engineering move very slowly". So time between payment and product arival could be a while.

Just to make one as demo would be very costly, so in a bit of dilemma. If i could get five people keen i could make a batch. I know its a lot of dolla when you haven't seen the finished product, i'm only trying to help people out. Not had that many people comit so far this might be a non starter.

[gttjames]

Correct I've done some snooping....... Rang bob lol 200+vat+delivery so call it £260, they can be made cheaper. :D

ouch, im so glad iv got my BMS and seems it was worth every penny

Only seen pics of these 'big jims' but they dont look very good compared to a BMS, and for that money? ouch, im sure they can be made up cheaper and better quality, just need to find someone that can and will

yummmy
http://i15.photobucket.com/albums/a371/sr50james/ice003.jpg

[Brigsy]

The BMS downpipes are far better, somebody needs to convince boris to make another batch:)

[TNT Tricky Nicky]

The BMS downpipes are far better, somebody needs to convince boris to make another batch:)

:agree:

[sammo_gtt]

The BMS downpipes are far better, somebody needs to convince boris to make another batch:)

Im in the process of havin a bms pipe replicated and having 5 made to start with to see how well they sell

[steer from the rear]

The 5 bolt flange for the back of the turbo is £23, then it's a case of cutting a 90" pipe say 3" in half adding to it in the middle so it's a Bellymouth then warming and forming the bend to follow the contour of the 5 bolt flange

Tig the belly mouth to the flange then add the the down pipe part (swept 90" pipe)

Problem is the conical taper flex part on the bottom

But making say a BMS elbow to match up to a exsisting 2.5" down pipe wouldn't be costly or time consuming

I thing it's a case of buying a 2.5" 90" tight ss pipe (£19) opening and forming the end up
To fit the exhaust housing bolt pattern flange

[dave_gtt]

Im in the process of havin a bms pipe replicated and having 5 made to start with to see how well they sell


Let me know a price when ready mate, i want one of these downpipes wherever i have to get one.

[gttjames]

The BMS downpipes are far better, somebody needs to convince boris to make another batch:)

deffinatley

[Alastair]

The BMS downpipes are far better, somebody needs to convince boris to make another batch:)


Ive asked him and he isnt really interested, large outlay and he got messed around a lot. If the price went up he might be interested but what would people pay? 230 delivered?

[Alastair]

The 5 bolt flange for the back of the turbo is £23, then it's a case of cutting a 90" pipe say 3" in half adding to it in the middle so it's a Bellymouth then warming and forming the bend to follow the contour of the 5 bolt flange

Tig the belly mouth to the flange then add the the down pipe part (swept 90" pipe)

Problem is the conical taper flex part on the bottom

But making say a BMS elbow to match up to a exsisting 2.5" down pipe wouldn't be costly or time consuming

I thing it's a case of buying a 2.5" 90" tight ss pipe (£19) opening and forming the end up
To fit the exhaust housing bolt pattern flange

The BMS ones are all hand formed in a number of peices over a dolly so they dont crack, Ben spent a long time R&D the design/materials as the heat stress soon cracks them if they aren't done right. All his laser cut flanges were proper stainless too and cut down the profit margin...

[dave_gtt]

Ive asked him and he isnt really interested, large outlay and he got messed around a lot. If the price went up he might be interested but what would people pay? 230 delivered?

I'm definetley interested in one, no messing about. Will pay in advance if required:)

As long as the price is reasonable of course.

[Brizza]

The BMS downpipes are far better, somebody needs to convince boris to make another batch:)

:agree:

I'd deffo have one of those :)

[Brizza]

yeah if BMS style ones do become available put my name down for one and I'll pay in advance too no probs :)

[r5_scotty]

I'm up for a bms downpipe think we need a list!

[series111]

I would also be up for one if these become available..

[dangerous dave]

My BMS is a masterpiece, I know I'd try tap him up if I were in need of one... Why let someone else profit, ask the man himself to price up a batch, cut out the middle men.

If he's not interested then a group will just have to go elsewhere and replicate.

[R5TURBORON]

I would be interested in a BMS one if we could get them

[car.crash]

Bms pipes are epic. Not seen one crack or fail unlike race land manifolds.

[Ian S]

Ha, it's like you read my mind in as much as I was about to suggest someone ask Raceland to make a batch of BMS style pipes.

Someone told me they are made in South Africa.

Have any of the RTOC Group Buy Raceland manifolds cracked?

[dangerous dave]

Ha, it's like you read my mind in as much as I was about to suggest someone ask Raceland to make a batch of BMS style pipes.

Someone told me they are made in South Africa.

Have any of the RTOC Group Buy Raceland manifolds cracked?

I think so but we all know we are setting ourselves up for a failure.. Nearly all of us have binned our brackets from the manifold, turbo, downpipe to exhaust so when they have cracked part of that's to blame.

A few people have added supports or use the oe brackets and I expect these to last longer. :)

[car.crash]

The raceland welds are piss poor. I wouldn't have one if you gave it to me. The quality on the flanges also suck. I would pay over £200 for a bms down pipe because his work is the best.

[Tony Walker]

My raceland manifold was fine, has been on car around 8 months, i do have the downpipe support bracket, ive also since fitted a bar on the turbo manifold mating flange to support the weight (just in case) thats only been on a couple of weeks.

[Dan May]

Ive asked him and he isnt really interested, large outlay and he got messed around a lot. If the price went up he might be interested but what would people pay? 230 delivered?

I'm definately interested too...

[Ian S]

There are other places; Simpson race exhausts (http://www.simpsonraceexhausts.com/), Haywood and Scott (http://www.haywardandscott.com/).

Haywood and Scott: "We are so confident and proud of our work that we give a 25 year guarantee on all our manufactured exhausts (to the original buyer & vehicle)."