well done palsorry not been on the blower b4 just been up to my eyes in it....will take time out soon for a chat
well done pal
stage 2 done just waiting for podnext month fingers crossed video should be on soon
What date next month you planning on going to pod mate, may try pop along too with campus once it get its new head fitted.Originally Posted by Hi 5
stage 2 done just waiting for pod
next saterday son if the weather forcast is ok
Good luck buddy.
thanks pal just hoping for good weatherGood luck buddy.
better late than never
http://www.youtube.com/watch?v=2JZZYjJjudk
cheers son thanks
Nice video, how much gas are you using?
lots and lots
about 130hp's worth if you believe the numbers. it's programmable though, so there's a different amount in different gearslots and lots
Devils advocate here , what are peoples views on gas usage and the 1/4 mile leader board rankings seeing as we have 0.01 splitting the top 2 RTOC boys .One on gas , one not .
Discuss
everyone will have a different opinion on this one, it would make for a good debate
My 2p, and the way I see it is that if you want to go much faster than that sort of time you WILL need nitrous.
It's possible to build a non nitrous motor like Stu did and make that time as Stu has proven. That is really impressive. I think even with the EFI we'd have been hard pressed to do what Stu did.
But, as I'm sure Stu will tell you, it is almost imposible to make any more power than that though. With glenn's from the off it was always going to be a nitrous motor, with a goal of going much quicker than 11.4, so everyhing about it was put in place to make the best use of nitrous and in larger doses than it has now. With nitrous it shouldn't be too hard to go quite a bit faster still, to get up there with gianni. If we had built a high performance non nitrous motor then we'd be tearing the engine to bits right about now wishing we'd have built a nitrous motor from the start. It's all part of the master plan *lol*
it's all good fun which ever way you go, and none of it should be taken too seriously
What are the main differences as far as engine build goes ? Does it work better on a particular design or layout ? Would a lazy old V6 respond well ?
there's not loads of changes but as far as nos on yours son depends just how far you have tuned yours ie how much to the limit it is but any motor out there will accept 50 bhp of gas but mine was built with 300 bhp of gas inmind so a little more thought was required in how to get the nos out. getting it in no problem
yours would respond really well to nos as the bmw 8 series in the video is running 150 bhp of nos and the chap was loving it
nitrous changes a lot of things! essentially there is a lot more exhaust gas to deal with so exhaust valves, exhaust ports, turbine sizing and wastegate all need thinking about. compression ratio gets a lot more critical too. it's really hard to put a lot of gas into a motor with a c/r that is too high without having to overly compromise on ignition timing, which directly effects EGT and the likelyhood of other nasty stuff happening in the chamber. Like most tuning though you can only guess the starting points, it's down to trial and error in the end. Like recently we discovered that glenn's motor responds to more boost better than it responds to more gas. That was a bit un-expected so we just have to roll with it and see what happens.
I miss NOS days with the old GT
you playing at pod next weekendI miss NOS days with the old GT
Im Not racing but should be there if weather is good for the day out..
Answers one of my questions as I was thinking of nitrous on my engine, I know the comp is fairly high being an MSM build & I had already thought I'd need to use some sort of aftermarket ecu for timing..hmmm, maybe see what it will do off the bottle 1st & then maybe look int oforged pistons & a slightly modded c/r...
All I know is I'm itching to get back to pod
how do these volvo lumps respond to a bit of nos?
lets not get lost with my engine spec as last year i run standard every thing but a gt28 and a 285 cam and 80 bhp of gas and 22psi of boost,on carb standard engine and did 170 drag strip runs no problemAnswers one of my questions as I was thinking of nitrous on my engine, I know the comp is fairly high being an MSM build & I had already thought I'd need to use some sort of aftermarket ecu for timing..hmmm, maybe see what it will do off the bottle 1st & then maybe look int oforged pistons & a slightly modded c/r...
All I know is I'm itching to get back to pod
I know it's all in the set up, but having higher comp isn't going to help & I'm wondering if the standard ecu (if you can call it that) will have enough retard when using gas.
It's definatly something I have been looking into & reading up about... I'm trying not to be spoon fed about this but it could end up costly if I don't get a few pointers from peopleso am tring to gain as much info as poss.
as i said standard i was on a renix 209 without retarding any timing at all and run 80 bhp of gas no problem if you need any more info my no is 07968069723 as i have been using nos for yearsI know it's all in the set up, but having higher comp isn't going to help & I'm wondering if the standard ecu (if you can call it that
It's definatly something I have been looking into & reading up about... I'm trying not to be spoon fed about this but it could end up costly if I don't get a few pointers from people
It wont have enough retard to cope with a high comp MSN... depends how much gas you run tho, i would have thought you want to make big numbers so id sooner start lower comp and work from that base..I know it's all in the set up, but having higher comp isn't going to help & I'm wondering if the standard ecu (if you can call it that
It's definatly something I have been looking into & reading up about... I'm trying not to be spoon fed about this but it could end up costly if I don't get a few pointers from people
Cheers I'll take you up on that, I prob won't run any gas till the spring, I'll see how the car copes 1st without, low 12's is what I'm hoping for without.....
Can't wait to see what your car does next time it's out
Yeah I thought the high comp would cause probs from what I've read up on Rob... The way I was hoping to get round it was with aftermarket ign ecu bud, you think it's worth a shot ?
I may just see what it does without gas & then lower the comp... I may have to go on a diet to get into the 11's though
when you say high comp how highYeah I thought the high comp would cause probs from what I've read up on Rob... The way I was hoping to get round it was with aftermarket ign ecu bud, you think it's worth a shot ?
I may just see what it does without gas & then lower the comp... I may have to go on a diet to get into the 11's though
OK You see this is where my car was different... My old car ran flat top pistons, and at a guess with 23psi boost i couldnt run much more than 35hp-40hp tops @ 4 deg retard and i was on limit just before det.. 99 ron fuel..
8.1:1 I think.
I think the thermodynamics involved with this particular argument are a bit beyond the scope of this thread but in basic terms the no.1 rule is to keep your ignition timing somewhere close to optimal even if it means sacrificing some compression to do it. It's especially important in a highly stressed and compact engine like the c1j where stuff can go wrong quickly if things arn't happy.
steve, if you want to stick with pump octane then you will need to lower that c/r for sure.
Put some proper fuel in it
Yeah, I'm coming round to that idea Chris, I have no idea where to get higher octane fuel anyway..lol.
When James ran the VNT @ 23psi manifold the TDC was fully retarded, he moved it to standard & it popped the gasket right away... I think we can safely say the gas won't help that
Det-cans at the ready me thinks..
can you use that octane booster that you can buy in in a can. is that any good?
1 of the best octane booster on the market is cvl turbo made by millers oils
could you not just dump some of that in the tank wind the boost up and add a 150bhp shot of nos then1 of the best octane booster on the market is cvl turbo made by millers oils
if it was that simplycould you not just dump some of that in the tank wind the boost up and add a 150bhp shot of nos then
Gas V Boost...
In my opinion, my old motor would have responded to a larger turbine housing if I were to persevere with gas. The extra exhaust volume could not be dealt with (i am guessing a little as didnt test any other housings) and as my gas went straight into the inlet manifold the carb did not further restrict...
I didnt want to increase the housing for a number of reasons but mainly due to gearing as running only 3 gears means you need a large torque band, narrowing the torque band would have meant using 4 gears and due to selections available would mean potentially a non gt box.
My intention was always to stick with the basic set up as Renault intended and for the record it was basically the following.
Std crank, balanced
Std rods, balanced
Forged pistons, similar to standard but with beter oil return, lower skirt, increased squish band but dished not domed.
Std valves on 3 angle seats
Std head, altered chambers and well machined (not huge) ports
Std ex and inlet manifolds
Std carb re-jetted, 27.5mm venturi
different cam with vernier
3 extra engine breathers
std distributer, leads, ecu and ignition timing
i found through years of trying and testing that gains are in the finer detail, cam timing, exhaust housing sizing, temperature control etc
I think given more time, my engine would benefit from gas but that i had found the limits of the gearing and trying to hold the transmission together, I also found that my engine responded better to boost than gas and that maybe my next step should have been a better ignition map/bespoke ECU, oh and steel rods might have helped...
VAG gearbox gives you more options also...
A 10 second C1J, I would love to see!
Incidentally, has anyone seen my old car, seems to have dissapeared?!?
I havn't seen it about Stu
maybe you need to check here?I havn't seen it about Stu
I havn't seen it about Stu
Dont think it will be chasing any 1/4 mile records in the future, the lad who as it now bought my SD roll cage for it, think its due on the road nxt year.
shame its not going to be on the strip but dave will keep me on my toes
It is a shame, it will be a very strange car on the road as it was a big boost set up, I found it almost impossible to drive on even the best roads...
Good luck
new times on saterday at pod 11.20 and 11.28
new times on saterday at pod 11.20 and 11.28
So whats stage 3 then!
not tried stage 2 yet want to try that first but on with stage 3 as well
So whats stage 3 then!
Ah cool so bit more playing about with the current set up.
I see you after new head so can imagine what the next step is.
Ah cool so bit more playing about with the current set up.
I see you after new head so can imagine what the next step is.
ah see/
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