Club G40 Forum
Club G40 => General Car Chat => Topic started by: benh999 on December 20, 2009, 04:54:46 pm
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Well after selling my Eaton'd G40 to Giorgio a couple of years ago, I've missed the G that much that I'm off to look at one this coming week. I've since owned a mk1 g60 16v but even with close to 300bhp, it did not feel as urgent a the G40.
Plan is to buy a good example and then spec her up as before, Although I did love the Eaton(and one may come my way soon) I shall either stay with an R1 lader or go turbo route.
Cant wait to get behind the wheel again. Very basic car but power to weight makes it all worth while. I may even try and make the interior more luxury ;)
I'll post up as soon as I've seen her
Ben
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welcome back!
you always come back to g40s
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Hello Ben, good to have you back in the fold :)
Do you still have the S3?
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no mate I've just shifted her on to the tune of a tidy £1200 clear profit after a years motoring. I've bought my cousins black Seat Leon cupra (03 reg) 58k miles and mint condition with a REVO map for half the price I sold the S3 for, hence why I'm treating myself to a G. there's one in particular thats caught my eye which I'm off to see on tues although I've seen a royal blue one for sale In Daventry close to me. 8)
Just got to decided whether to stay supercharged or go turbo, kinda feel the turbo is losing the spirit of the G40 :-(
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Rae should take heed at this then..selling a nice G40 for a series one S3 :D
Supercharged all day long for me on that argument. Might not be the sensible or reliable option, but we wouldn't have all opted for the fast polo if that was the stumbling block ;)
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welcome back Ben. nice to get a surprise text off you the other day! I knew you'd be back on the g40 scene. If power is what your after I'd go for the turbo. There's a wealth of knowledge now with the turbo applications and they certainly seem the route to go. If your sticking with superchargers why dont you keep the G lader, spec it up a bit and invest in some handling upgrades. I think a nicely set up 150bhp G40 on original charger with some fresh parts, a subframe, good wheels and tyres, brakes and suspension could be a real weapon.
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Well both of the G's I am looking at are both equipped with Jabba R1 spec chargers both of which have been recently serviced :)
I think I will take it as far as I can with the G-lader and concentrate on brakes and chassis. I will prob opt for PPP subframe and one G needs an exhaust, so If I could get my hands on a PPP full system, I will do :-)
misseed the G40 scene, look forward to getting back into it and hitting the shows hard in 2010.
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Off to look at first G40 tomorrow :)
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perfect time to buy, seen a few sell cheap recently
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missed the G40 scene, look forward to getting back into it and hitting the shows
And me Ben, PPP system and subframe for me too :)
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I know the feeling of missing the G40!
I sold mine after owning it for 2yrs and had to buy it back as i missed it so much.
Owned mine now for about 2 yrs and enjoy it everytime i drive it, even go driving it just for the sake of it at times, never get that feeling with the A3 or the R32! Will never sell the thing, was going to sell it to fund a Honda S2000 a few months ago but decided that parting with the G would be a massive mistake, so its going to go into storage for the winter months rather than selling it.
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missed the G40 scene, look forward to getting back into it and hitting the shows
And me Ben, PPP system and subframe for me too :)
yup, i'm already figuring how I will be putting my own mark on it. To Be honest I'll prob whip the engine straight out and give the bay a respray for shows etc. May even go BVH route :-)
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Excuse my ignorance, what do you mean BVH?
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big valve head
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I'd like to hit around 200BHP ;D
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One thing i noticed and worthwhile bearing in mind if you are staying with the G40 blower; don't go bigger bore than 2.25" on an exhaust system.
I've recently installed one of the PPP systems which is 2.5" at the downpipe exit. Having stepped up directly from a 1.75" system, i have lost 1 psi of boost. Mine already has a very well flowed BVH cylinder head which was giving 9psi boost on the OE bore with a 4 branch, now gives 8psi with the PPP system (65mm toothed pulleys). Car certainly feels more laggy low down now than it did. I could fit a bigger blower of course to get max output, but i'll try tweaking a few things before i go down that route.
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you've lost 1psi of boost because more air is getting consumed by the engine as the exhaust isn't causing as much of a restriction. So 1psi less back pressure in the inlet manifold = more power. :D
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Think you've got some wires crossed Nick...
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P.S- It's good to know our systems flow more than stock ;)
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lol
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L O L
Feels more like a turbo now anyhow
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really? how does it feel like a turbo?
btw where is my sodding breakfast coolant boy?
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really? how does it feel like a turbo?
btw where is my sodding breakfast coolant boy?
Power delivery.
That was your ethylene glycol special liquid breakfast.
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really? have you driven a turbo'd Polo before?
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Nope, just a fezza RST and Nissan Silvia petrol engine wise.
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can't really compare it to a turbo'd polo seeing as you not driven one lol.
comparing the lader to the turbo is a massive difference, yes i know your's is not the standard lader set up but the difference between the 2 can't be as big as the difference from the lader to the turbo, the turbo feels VERY VERY much like a lazy GT engine until it comes on boost then its frantic after that.
i can see why you say yours boosts later but the turbo boosts alot higher in the rev range than the lader on any set up.
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Thats like how mine behaves, don't notice any positive boost pressure until about 4.5k then its a rampant mo fo.
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Thats like how mine behaves, don't notice any positive boost pressure until about 4.5k then its a rampant mo fo.
really? that high up???? that will be shit for road use! no boost no boost no boost no boost no boost no boost then 8 psi of boost!
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also if it only gets into boost at 4.5k that means you have 2.5k max to go before you have to change gear!
you sure you not driving a diesel?!
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It don't need lots of boost low down when its as torquey as hell off it. Engine was built with high boosting in mind, so i'm not all that surprised ;D 8P box on at the moment don't help to compare acceleration/gear changes, but 1st and 2nd are pretty useless :D
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Your car really needs a proper setup Nick, though I must say I'm surprised that you're not getting any boost 'til 4.5k. What cam are you using?
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Engine was built with high boosting in mind
cool at least you had a target, what parts have you used for the high boosting in mind?
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252/276 schrick
To be fair its probably going into positive boost figures around 4 grand, but when its wet and dark at the time of having a test rag, you spend a lot more time looking where you are going.
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good point...........................
aren't roads open during the dry and daytime in manchester?
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When you have a car as loud as this is at the moment, best keeping to times when there are fewer people on the roads ;)
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surely its worse to drive a loud car at night as there is less traffic on the road to hide your loud exhaust!
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Have to admit I've noticed the same thing, with the larger bore exhaust you dont get the same feel of low down torque than with a smaller bore system, remember a supercharged system works in the same way as an NA type lump.
I put a 2.5" exhaust on a near stock G40 a couple of years ago as thats all I had about at the time, and although it pulled harder at higher rpm, the low down grunt suffered.
And when I think back, my first was a 150bhp G40 on a 1.75" system, that felt very torquey, where as a car I've got now with the same mods and a 2.5" system and its as above picks up better at higher RPM but in exchange for a bit low down.
2.25" is good for 140-180bhp, and seems to be a good balance on midly tuned G40s I'd say.
Nick, get a 60. ;D
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Not surprised you lost torque on a stock G40 with a 2.5" bore to be honest Phil...
All G40s running 170bhp+ generally have 63mm systems- with a smaller bore you may find bottom end torque to be better, but when flow is limited at higher RPM, power and torque suffer higher up the rev range.
Personally sacrificing a little low down torque for mid/top end power in a G40 is not bad thing, they wheelspin enough in 1st and second as it is. I'd like to measure the backpressure differance on a 1.75", 2", 2.25" and 2.5" system :)
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getting back on subject I may have just bagged myself a g40 :-) All going well I pick her up on 4th Jan
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Good news Ben- bagged a good 'un.
To add on what I've already said, this backpressure argument with a larger bore system is b0llcks to be honest. The drop in torque Phil/Nick are experiencing is due to the A/F ratio changing due to a larger flow of air. If you consider 'boost' as back pressure instead of manifold pressure- you've both fitted a larger bore exhaust system- Nick has mentioned a drop in boost pressure- ergo an increase in flow through the engine.
Unfortunately the poor old Digifant ECU can only work with what the MAP sensor tells it, so even though you're flowing more air, have a lower manifold pressure reading, you actually need more fuel. Torque curves can be massively affected by A/F ratio- my Clio for example 'comes on cam' at 5,000rpm.... does it bollocks! It's a marketing thing which Renault did to give you a kick in the back once they actually add some fuel in above 5k.
To conclude, you won't loose any torque by fitting a 63mm system or a decent 4 branch, providing your car is mapped properly afterwards. I know neither of the above cases have been, so a comparison between the two is unfair.
Nick- I'd check your cam timing too, you should see positive boost pressure well before 4500rpm.