What mods have you done to your GT's ?

Steve_O · Post by **Steve_O** » Sun Jan 02, 2005 7:25 pm

But according to dom's post, it should improve low end torque no end!!

*Not that I can get any grip at the moment anyway!!

Gareth_GT_Hatch · Post by **Gareth_GT_Hatch** » Sun Jan 02, 2005 7:32 pm

yeah so better for driving about town and motorway crusing, maybe slightly less useful for the traffic light grand prix. Dom what were the torque values above 4000rpm? If the torque stays higher than it is on the GT manifold then I cant see any reason for complaining.

hardhitter · Post by **hardhitter** » Sun Jan 02, 2005 7:34 pm

Gareth_GT_Hatch wrote: theres a guy who lives near me called neil chatergee, he's got a GT conversion (originally a 1.3 genesis) and his cars got a g40 inlet manifold and an 8P box. last time it was on the rollers it got the same as hardhitters GT with similar mods. (Exhaust, chip and induction kit) obviously these componets do vary a bit but if we ignore that fact (becase its easier for me to ignore it ) then the difference made by not having a gt manifold on a mildly tuned engine is marginal.

Just to add, at that rolling road day my car was not running right. It was heavily overfuelling. Not an ideal comparison, gareth. If your not tuning your engine then a NZ/G40 manifold should get you more torque. I think your top end would tail off sooner. Definately keep your manifold if your are wanting to mod your engine.

Gareth_GT_Hatch · Post by **Gareth_GT_Hatch** » Sun Jan 02, 2005 7:39 pm

hardhitter wrote:
Gareth_GT_Hatch wrote: theres a guy who lives near me called neil chatergee, he's got a GT conversion (originally a 1.3 genesis) and his cars got a g40 inlet manifold and an 8P box. last time it was on the rollers it got the same as hardhitters GT with similar mods. (Exhaust, chip and induction kit) obviously these componets do vary a bit but if we ignore that fact (becase its easier for me to ignore it ) then the difference made by not having a gt manifold on a mildly tuned engine is marginal.

Just to add, at that rolling road day my car was not running right. It was heavily overfuelling. Not an ideal comparison, gareth. If your not tuning your engine then a NZ/G40 manifold should get you more torque. I think your top end would tail off sooner. Definately keep your manifold if your are wanting to mod your engine.

Aye I knew I didnt know the full story. You did alot better the year after didnt ya. Anyway that info doesnt really matter now, doms results mirrors exactly what youve just said.

any news on my exhaust?

nuttinnew · Post by **nuttinnew** » Sun Jan 02, 2005 8:02 pm

If you can't get grip get new tcas, the rubbers are probably fubard.

You may well get more torque at lower revs but when is a GT at such revs? A GT is designed to breath better at higher revs which is where you get pretty much the only improvements over a std 1.3 carb. The torque may suffer at lower revs as a consequence but then they're shorter geared to compensate so you spend more time at higher revs where it's designed to work best. However, I do like the sound of it on a Â£F with an 8P.

metz · Post by **metz** » Sun Jan 02, 2005 8:22 pm

Not experienced a GT with 8p box yet (unless Dans car has one) but i can vouch for the AYZ gearbox.

nuttinnew · Post by **nuttinnew** » Sun Jan 02, 2005 8:32 pm

How does that compare to an AYZ?

Gareth_GT_Hatch · Post by **Gareth_GT_Hatch** » Sun Jan 02, 2005 8:41 pm

ayz is the same as 8p but with a higher final drive ratio, so all gears are slightly shorter.

I dont think many ppl have a standard GT with the 8P box. Dan certainly hasnt (but he is after a G40 one on his top secret project) Theres just me with the 8P on the 1.4. Steve (86c) has an 8P on his tuned NZ and he rates it highly as well. but it is all in a mk1 which weighs alot less than my car id imagine.

nuttinnew · Post by **nuttinnew** » Sun Jan 02, 2005 8:46 pm

Sounds good, like half way between the two. Nice.

poloace · Post by **poloace** » Mon Jan 03, 2005 12:03 am

Well I don't own a GT now but I recently built up Liz (Bluegirls) MK2 GT useing my old engine, and that was RR with 99bhp with the following mods.

My own Custom Chip
278 schrck cam (not 100% sure on duration)
Ashley 4 Branch (blowing)
Doms old stock GT exhaust system
G40 inlet manifold with slightly restreicted no:1 inlet due to Huge Servo and major manifod choppage.
Ecotek valve
K&N panel filter+ drilled airbox
slightly flowed air flow meter
Modified Dizzy mounting to give more ignition advance due to the cam needeing a vernier pulley.

This thing goes like stink, I can't remember torque figures. But I really need to suss out the reve limit position as it to low when driving it as 4000rpm to the limiter just wizzes past.

I fast road cam will really bring the GT to life and if setup resembly will give gains of about 10bhp with a ported head and a vernier I can see that that car making at least 110bhp.

8v GTI golf feels so much llike a GT to to drive maybe its the digifant

nuttinnew · Post by **nuttinnew** » Mon Jan 03, 2005 12:42 am

Interesting...proves my blue GT was never quite right. That had;
Drilled 'box/K&N
Flowed head
Schrick 268
De-cat and std exhaust
Chip

It never idled well (my cab with lairier cam has no probs) but 2k rpm was like a switch and it struggled for grip in 2nd (no, the suspension wasn't knackered!) Thing is, it never seemed to have any top-end. Dizzy was wound round as far as it'd go or it was lifeless. Got to say I was rather disenchanted though it made 85bhp/85 lb/ft with the head gasket blowing two cylinders. Would've been nice to try it with a std cam to see if that was the prob as it never went as well as it should have. Hell, my hatch with just decat/chip/K&N made more bhp!

I'm trying hard not to play with the current GT as I need to sell it really but, well, you know...

Tahrey1043 · Post by **Tahrey1043** » Mon Jan 03, 2005 1:48 am

what of a de-wedged / derestricted G40 manifold then? would that still retain the deep down torque whilst being more "open" at the top end?

thought having the multi-point electronic fuel injection was supposed to cure a lot of those dead-ending problems anyway?

after all even a 1-litre's probably putting out more than 35lbft at 2k (it's lovely to truck along at 30-40 in top and never think of changing down)...... though it's entirely true that the GT should never need to be that low apart from in 1st for a rolling or bodged start, or idling along in traffic in any gear

(peak at 5900-6000 goes down to ~3600 as a minimum, for 1st to 2nd)

poloace · Post by **poloace** » Mon Jan 03, 2005 2:05 am

Sounds like lack of ignition advance, as they cam are setupo to use a vernier of a different dizzy maybe but withoug filing they run to much retard so feel a bit crap to dirve I never got my MK2 GT running coudl due to that and never bothered to file the dizzy.

nuttinnew · Post by **nuttinnew** » Mon Jan 03, 2005 2:38 am

Interesting...I need another flowed head now then! Sounds about right as even with the dizzy wound right round it wouldn't pink. I'm getting more interested in playing about with the current one when I shouldn't!

nuttinnew · Post by **nuttinnew** » Mon Jan 03, 2005 2:52 am

I'm sitting here wishing I'd actually got round to moving it a tooth...