It took three years Mart but, when I found one it came at a bargain price!Originally Posted by Mart
It took three years Mart but, when I found one it came at a bargain price!
Scoffs getting hot under the collar from our new B18 build and a 72mm blower
The key difference between those manifolds is gas velocity in the runner and hence port. The cfm rating is not the full story on it's own, but tuning the gas column velocity in the rpm range you wish to achieve peak power, and peak torque. The instantaneous cylinder fill (on valve opening) first has to be provided by the valve bowl area and then port volume - gulp if you like, then you need to get the gas column going in the right direction isn't easy, especially at high rpm. If you are only working in a very narrow rpm range and low down flexibility isn't required, then massive ports, runners and plenum volume is the way to go to ensure the cylinder can achieve maximum fill - gulp at high rpm. However, at low rpm the velocity will be poor and the cylinder fill will be poor likewise, just a trade off. All good stuff
these guys do some interesting work for the hondas....
http://www.bmcrace.com/
they offer a "modular" race inlet manifold, with has seperate bolt on plenums, so racers can experiment with differant plenum volumes to tweak torque curves, they also do a vast option of runner lenth/width configurations to go with the inter-changable plenums.
great for testing
they actually post on discussions on the forums, and take feedback etc, they have even just loaned there lastest design race mani to the biggest guy in honda tuning (miller) for independant testing on his car, and have asked him to post dyno results of before and after, which i was quite impressed with
i doubt there cheap, but they do anything custom, im sure if someone sent them a flange, or even full standard inlet mani, they could knock something up, i bet it would be cheaper than finding a casting company who will need to make moulds etc
I think there is someone here who will make one off manifolds, can't think of his name though...
Rather Large James rings a bell?
Lots of peoplemon this forum have said that the tubular exhaust manifolds offer little gain on a carb C1J but is it worth it when used in conjunction with an efficient EFI manifold and set up?
I would still love to do twin scroll but funds, like most, are holding me back. That said, if the Aussie dollar gets any stronger, that might not be an issue! Who am I kidding!?!?!
sorry for dragging this thread up again but there seems to be conflicting stuff all over this site about efi manifolds, so........
im looking into it and been looking at michael tierneys new manifold, just pm'ed him about it, but this looks like it uses the same gtt inlet manifold, i understand what people are saying about this, ultimately it was never designed for this, but at the end of the day, are people running these getting better power thoughout the rev range with good afr readings? from what i have read they seem to be working ok?
im not after massive power from it, more interested in the reliability side of it tbh, although a nice power increase will be a bonus, my spec at moment is a t25 turbo, 285 cam and a fmic, thinking of adding a polished ported head on with the efi
so for a mildy specced motor is it ok?
MT's manifold adaptor will work just fine. The above thread is looking at a best effort design.
I'd have the inlet and exhaust ports matched to their respective manifolds (after you've got the MT manifold) and wouldn't worry about porting the head itself, especially if you're not after max power.
my latest offering
Looks good, if only that was available when I done emmas efi LPG conversion
This is the manifold I made....
https://www.rtoc.org/boards/album.php?albumid=11
Looks like the early escort rs turbo manifold that was two parts. That will make it very easy for people to go efi.
I have read you can also get 60-2 flywheels that fits the c1j, that have a 200 mm clutch and possibly even 215mm clutch but I need to try it out.
Good work
Looks goodmight be interested in one for the van
When i had a glanza there was a company that made very good manifolds for the jap cars,i did pm him once asking if he'd would make an efi manifold for the c1j and he said that he would do it.
here's a link to the site.
http://www.race-tech.net/index.php?m...ex&cPath=2_4_7
pretty sure he'd knock up some 1 piece downpipes too!
did he actually knock anything up for the c1J?
not a manifold thats easily made...space is too tight and thats why i had to go up instead of out and i could only come up 8inches.
I still need to count the teeth, but I'm 90% sure I have a 60-2 flywheel, it's certainly not like my GTT one.
Have a read at the second last post....
http://www.msextra.com/forums/viewto...?f=101&t=35973
It looks like the k7m will fit with 200mm clutch and 60-2, on a c1j but not sure about the k4m with it's 215mm clutch......be good if we could test this out
No need to mess around wit 36-1 wheels on the crank shaft pulley if this was the case.
i'll hopefully have another alternative to this manifold in about 2 weeks time...depends on the weather and a bit of luck!!
another offering...long manifold...long time comming
1139
Last edited by michael tierney; 08-06-2011 at 17:47.
ah the old rover t16 turbo inlet
I'm liking your latest offerings Michael.another offering...long manifold...long time comming
1139
a couple more different veiws with clearences over oil feed and actuator
Just won a K7M flywheel on the bay. Will let you all know how it measures up
I'm liking your latest offerings Michael.
because the engine leans back into the bulkhead and the bulkhead gets narrow i did it this way..the injectors squirt directly at the combustion chamber front wall...when the valve is open of course!
Andy has it turned up..... And more to the point does it fit
Michael, do you think it would fit with a bigger turbo like a t25 or even a t28. These turbos normally use a -31 actuator and they themselves are much bigger than standard?
I just wish you were making these when I made my manifold, it was the longest and hardest part of the conversion to do. Keep up the good work.
Chris
ANO not yet Chris, should be Monday. I'll let you know.
the ford one won't have an issue with the actuator....the rover one leaves about 10mm clearance between it and the actuator pipe...but if the scroll is much bigger and the actuator ect then it'll be too tight!I might end up grafting the throttle to the manifold somewhere else
i offered to make some more like mine i made but no one wanted to pay the price a lot of work go,s into it but look in my profile under new 2010
great looking manifold glenn...your not afraid of using boost!
chears pal on testing we managed 38psi on nos lolgreat looking manifold glenn...your not afraid of using boost!
Just out of interest glenn , what kinda ball park figure you talking for them inlet manifolds ????
what was the rough price of your mani? thanks allan
if i could get a order for 3 of them i should be able to do them for about £550 and i would only break even at that thanks glenn
good work pal i carnt do 2-3 weeks it would be more like 6 months as am too busy racing and working
That price is very tempting, proper inlet manifold
any one seen this one, not that tidy tho
http://cgi.ebay.co.uk/Renault-5-GT-T...item1c1c57cb23
lol.......................... i think micheal offers some very good options for people at sensible price
his calculation assumes no boost too
i dont under stand ?his calculation assumes no boost too
Rob might mean i hav'nt run it yet....which i hav'nt......i'll probably be going efi in about 6 months...driven of course by the price of petrol!!!
i should have a few pics of the manifolds on-car ect within the next few days,i have to see what the clearances are for my t25 tomcat turbo
So as not to hijack
https://www.rtoc.org/boards/showthrea...363#post224363
no sorry i was referring to the ebay manifold he quotes a 2.1 litre capacity, (1.5x1400cc), i was saying he taking no account of how much boost the customer will run.
when i get a bit of time,which is severly restricted at the moment,i'll measure the volumes of the rs and rover headers Rob!!
1.5 litres in the black rover item,RS one is more difficult to do, i'd say its only slightly less though!!
just as an update...progress is very slow as i'm taking care of my 80yearold dad who has cancer so i'll post pics of the engine mock-up when i can!!no promises though!!
Sorry to hear that Micheal, I think most people will have experience with this also, I don't think the EFI is the priority here. Take care.
just a bit of progress and a bit of welding on the way!!
just tried a few different types out for size,the rs-1 fits really well
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