2 replies to this topic

[Spetz]

Hi everyone,

 

I have a CE coupe which I take to Winton for fun.

 

It currently has an FTO V6 in it so performance is adequate but as I am interested in handling I think it may be a disadvantage to have it due to weight at the front.

 

I have toyed with the idea of going 4 cylinder turbo, specifically the 4G93T from a CM5A.

 

Just wondering how well do these engines spool turbos up?
I am not interested in huge power (200kw at the front wheels is more than enough and will likely only run about 170-180kw) but good response is important.

So, an Evo 5 4G63 will likely make 200kw at the front wheels on the stock turbo and hit full boost by 3,000rpm (I assume?).

What would a 4G93T need as far as rpm to spool that same turbo to make the same power?

I understand the 1.8 will need more boost and likely cannot handle that power with a stock bottom end but the thing I am trying to figure out here is purely how much extra lag will the 1.8 have to gain the same type of performance as the 2.0.

 

Reasons I would like to avoid a 4G63 are primarily weight, cost, and of course complexity of installation.

[Ian91]

I’ve only got experience with cc 4g93’s but they are essentially the same engine, just mirrored. Mine is a stock 4g93t with evo turbo td05 16g and evo 560 cc injectors, ecu is a early link plug in and it’s had a quick tune and runs 10psi, it only makes 180hp so far but that’s awd at the wheels. It’s a little laggy in the really low revs but is basically full boost at or just after 3k rpm, the fact that I have no BOV probably doesn’t help the lag.

Awd drive train loss is more than 2wd so for you, you’d hope for maybe 190-200 hp at the wheels, I’m yet to go back and have it bumped up to 15psi and have him go back over the tune so squeeze a bit more out of it.

I reckon if you ran a ce 4g93t with all evo bolt ons, bigger fuel pump, converted to speed density, had a tuneable ecu (aftermarket or evo 5-6 for example) and ran 15-18 psi you would see 180 or so kw at the fronts and would see boost before 2500 rpm and full boost by 4000?


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[Spetz]

Thanks Ian,

 

What is 16g capable of powerwise?

And would you know at what rpm the 4G63 spools that up?

 

I think the CC and CE 4G93T are more or less identical, just mirrored as you said.
But the 4G63 would be quite different and I believe newer versions have an easier time of spooling turbos than the CC variants.