I want more response..but a bit more power would be nice too!

munday

munday

Member +
sx_turbo said:
4e heads are really really good as standard, the inlet side there isnt much that can be done, it the exhaust side that is more restrictive, but even that isnt by loads considering.
Click to expand...

So if you can get a cheap head, and spend a bit of time on it with a dremel if you think its worth the effort. Its not hard to actually make a head worse though, i have a good guide i can link you to, its for modifying a k series vvc head, but can be used as guidance. Let me know if you want the link and i'll find it :)
 
Gee

Gee

Member +
Here is some info I was sent by another member, I hope they don't mind me posting.

How would this lot help:

Intake
Enlarged ports
Knife-edged
Ported Injector Pockets
Blast finished
Intake manifold size matched
Tapered valved guides

Exhaust
Resized and shifted ports
Knife-edged
Mirror polished
Mani size matched

Other
Exhaust Valves polished
Intake Valves swirl-cut
Head de-burred and de-stressed
Steam clean
De-shrouded chambers
 
GTti

GTti

Member +
I'd forget about all of that, for the price you will pay.

You need to accept you can't have the best of both worlds which is why I much prefer the idea of differet setups to the TD04.

Sure increasing exhaust port size, smoothing of the exhaust side may help with exerting gasses, just as headwork will aid CFM flow and reduce resistance (So long as you don't reduce velocity in the process).

Also just how much space is there to perform work on the head, I'd say it's reasonably well made, removal of casting marks and various minor parts are probably all that is required.

This isn't going to result in any significant increase in response, perhaps 100 or 200 so RPM, you're more likely to gain power higher in the range.

My GTxx has headwork done by CTM, also regrinds from Piper, but there is a fellow member achieving 200bhp without either. I'd say the benefits are really minor, then again you have nothing else left to do with your car...
 
Gee

Gee

Member +
GTti,

Lag is really not that bad. Aslong as you dont mess up the gearing you are fine and I can't see it ever being off boost on track.

I'll admit, if you try and plant it in second below 3,000rpm there is nothing there but keep above this with gearing, set off in 1st and there is no problem.

The 5E boys have just got me jealous!

200rpm is better than nothing, considering it will also give you the extra power topend aswell. Sounds OK to me. Just have to justify the money vs gains.

EDIT:

Ps. Si's Glanza is a bit faster than mine, but it is running 1.5bar, I am running 1.4bar and his GT is obviously lighter, but running against another TD04 Starlet faster than mine pissed me off :D

Also, larger displacement cars have the edge up top.

Thats what happened :D

Really want to go 5E but can't justify the cost, probabaly got less than 10K on my current forged block!

The car really performs well on the street and not come across much that can touch it.

It's just a phase, I'll get over it and abandon the idea soon. Need to just enjoy the car as it is for a while!
 
Last edited:
gv1.3

gv1.3

Admin
Gee dont let it get you down dude :) I would be delighted to get my car to the performance levels of yours.

If its fast on the street, where you will actually use it every day, then whats the problem. Id work on my QTR mile technique as that will give you good results without spending huge amounts of money.
 
Dub-Se7en

Dub-Se7en

Lifer
i need to find the original rolling road graph that i had done before the rebuild, that will show any response difference.

i feel the headwork done to my engine has yet to show it's full potential due to the size of the turbo, but we found 33bhp from an exhaust and headwork on the CT9,

Judgeing by previous builds we have done we can expect anything up to 50bhp increase from headwork alone.
 
GTti

GTti

Member +
Gee said:
GTti,

Lag is really not that bad.

I'll admit, if you try and plant it in second below 3,000rpm there is nothing there...
Click to expand...

Sounds quite bad to me, perhaps your graph was a bit misleading to my eyes. I guess you have lost touch with what the car was all about as you have now been pushing power figures for quite a while.

To be honest I thought that was why the car was so fun to drive (Like the GTti), It had good performance all over the range, infact peak torque in a stock GTti / GT is around the figure you quoted where nothing happens.

The 5E boys have just got me jealous!
Click to expand...

Like for like there are very few 4EFTE engines doing what yours is power wise, I wouldn't feel bad about that!

200rpm is better than nothing, considering it will also give you the extra power topend aswell. Sounds OK to me. Just have to justify the money vs gains.
Click to expand...

Go for it, I was just stating in my opinion for me the performance per £ isn't there!


EDIT:

Ps. Si's Glanza is a bit faster than mine, but it is running 1.5bar, I am running 1.4bar and his GT is obviously lighter, but running against another TD04 Starlet faster than mine pissed me off :D

The car really performs well on the street and not come across much that can touch it.

It's just a phase, I'll get over it and abandon the idea soon. Need to just enjoy the car as it is for a while!
Click to expand...

Perhaps a little heal and toe action would give you the advantage? :D Although you do like to advertise the fact going as fast as you can on the street is important to you...

In all seriousness there are probably quite a few lower powered cars here that could out perform yours in one or more aspects just as yours would in others. If you want the balance you have to compromise, or if you are unwilling to do so then you're going to have to start exploring areas where others havent. You're going to have to spend a substancial amount of money if you want to take tha latter route.
 
Last edited:
GTti

GTti

Member +
They haven't really taken off yet, but I've heard they soon will and have been much improved!
 
Gee

Gee

Member +
gv1.3 said:
Gee dont let it get you down dude :) I would be delighted to get my car to the performance levels of yours.

If its fast on the street, where you will actually use it every day, then whats the problem. Id work on my QTR mile technique as that will give you good results without spending huge amounts of money.
Click to expand...

Yeah mate, thanks for that.

You are right, if you look at my launch on the QTR you will see how terrrible it is LOL.

I need to stop stressing and just enjoy the car! Think I will direct my energy into getting all my cosmetic bits on and fixing up my interior!
 
Gee

Gee

Member +
Sounds quite bad to me, perhaps your graph was a bit misleading to my eyes
Click to expand...

Nah mate, it really is not as bad as people like to make out! Obviously the car has changed a lot compared to CT9 driveability, but I would not go back to CT9 for anything!

Everyone who has had a ride in my car always comments on how 'there is no lag'. Its all about the gearing and how it is driven.

If we ever meet, I will be happy to take you for a spin mate. You can make you own mind up then.

I think us modders will never be satisfied to be honest.

Like for like there are very few 4EFTE engines doing what yours is power wise, I wouldn't feel bad about that!
Click to expand...

The power figures they obtain is very attractive, but its the torque that tickles my fancy!

TD04L on a 5E would just be heaven IMO.
 
Last edited:
Dane_Bristol

Dane_Bristol

Member +
The Greddy TD05 14G is a great turbo it virtually had the same spooling times as my K24/K26 Hybrid turbo.

Once my engine is built together with the Cusco 4.1KG Flywheel and port/polish on the head i will be able to finally comment and see the full potential of this turbo at 1.6-1.8 bar.

Then finally i will have some good results to show the stigma attached to the TD05 that is always ment to be a laggy turbo on the 4E when i am sure it will not be the case with this TD05 14G turbo.

Will be good to see what the Flywheel does and the porting/polish of the head.
 
GTwayne

GTwayne

Member +
Gee said:
I'll admit, if you try and plant it in second below 3,000rpm there is nothing there but keep above this with gearing, set off in 1st and there is no problem.

If I tried that in second my tyres would just light up.
Click to expand...
 
Gee

Gee

Member +
I could of explained better.

Obviously there is power there, its just that when it hits full boost, it is there so fast and hard it is a little desiving through the lower rev's.

If you have a TD04L I'm sure you can appreciate what I mean.

Maybe I should of said below 2,000rpm ;)

Put ya graph up mate.
 
Gee

Gee

Member +
Timmy said:
just give it a shot of nos.
Click to expand...

Haha, Nah!

NOS is cheating! :D

I'm going to stop bitching about the car, its fast enough for now. Probably just going to tinker about a bit with a few minor things.

Maybe heat wrap the manifold and downpipe, possibly get a PROPER stainless steel manifold made up in the future. Maybe go back for some map tweaks. I am still on stock limiter and have Pauter rods and Cruise valve springs..doh!

What rev limit would you guys suggest? I know gearing can help a lot in particular conditions and on the QTR mile.
 
You must log in or register to reply here.
Top