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Got Over 400kw Atw?

T04GTR

By T04GTR,
in Engines & Forced Induction

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colinhunt
colinhunt

Let's not turn yet another thread into a discussion about your car, please.

Lithium
Lithium
SiR_RB
SiR_RB

Posted Images

ido09s Mentor

ido09s

Posted
Posted

So i couldnt help myself and i have spent more cash. Being delivered to me today are some ARP head studs, until now its only ever had stock head studs, and some Tomei cam cap studs, ours are really old and have been in and out a lot over the years, so i reckon they are pretty close to be stuffed.

Also very seriously considering all the flex fuel set up to keep it all in check. Would get is installed but tuned later when the bank balance recovers a bit more. At least i would have the digital read out

Chasing 550rwkw now so will also get Unigroup to put some proper E85 in the tank as opposed to E-Flex and see if we can crack it.

Its only money isnt it

499kw :whistling:

tell me about it :(

Probably why its in hp and not kw's, i know i wouldnt want to see 499kw :( Oh so close to the 500kw mark ;)

Only needs another degree of timing surely!!!!!

Lithium Grand Master

Lithium

Posted
Posted

So we went in for a quick look over of AFR's and boost control after switching to a new exhaust manifold and rear housing with V band entry and the monster spat out another 60hp. It was not expected. We did go to a slightly bigger rear housing. 1.01a/r vband entry from the old t3 .82 split pulse. Boost increased by 2psi also.

attachicon.gifphoto.JPG

Not bad for a GT35r :)

Impressive - what kind of "GT35R" is it, run of the mill Garrett GT?

sky30 Mentor

sky30

Posted
Posted (edited)

So we went in for a quick look over of AFR's and boost control after switching to a new exhaust manifold and rear housing with V band entry and the monster spat out another 60hp. It was not expected. We did go to a slightly bigger rear housing. 1.01a/r vband entry from the old t3 .82 split pulse. Boost increased by 2psi also.

photo.JPG

Not bad for a GT35r :)

How many extra rpm is full boost with the new housing, do you have an old graph to post up?

When you say another 60hp, is that at wheels or flywheel?

Also what engine and head you using?

Edited by sky30
r33_racer Grand Master

r33_racer

Posted
Posted

It's a garrett GT35r that MTA (Mr Turbo Aus @ Gold Coast) rebuilt and put his billet compressor wheel into. Its proving to be quite potent so far. Its pushing some serious flow at low pressures. On the old manifold and housing which was split pulse T3, it made about 600rwhp on 21psi. That was with the 0.82 rear which was clearly too small and choking the crap out of the engine. We just put a Modena 6 Speed Sequential box in it to replace the dead PPG gearset. Now with the sequential box, the IGN cut for flat shift has been killing the turbo gaskets!

So you see we went to v-band manifold and housing to improve reliability and in turn it made another 60rwhp. Most likely, purely because we went up in size with the rear housing, which also increased the boost by 2 psi no doubt due to less back pressure.

The engine is a Spool 3.4 Stroker with a 25 head. The lag difference was pretty well nothing. I'm not sure if I have an old dyno graph with old setup around. I will look for it though. The extra power was at the wheels too.

I am too scared to measure back pressure in the manifold...big cubes(for an RB) and small turbo, im confident the EBP will be spectacular.

Hopefully I covered everything!

sky30 Mentor

sky30

Posted
Posted

It's a garrett GT35r that MTA (Mr Turbo Aus @ Gold Coast) rebuilt and put his billet compressor wheel into. Its proving to be quite potent so far. Its pushing some serious flow at low pressures. On the old manifold and housing which was split pulse T3, it made about 600rwhp on 21psi. That was with the 0.82 rear which was clearly too small and choking the crap out of the engine. We just put a Modena 6 Speed Sequential box in it to replace the dead PPG gearset. Now with the sequential box, the IGN cut for flat shift has been killing the turbo gaskets!

So you see we went to v-band manifold and housing to improve reliability and in turn it made another 60rwhp. Most likely, purely because we went up in size with the rear housing, which also increased the boost by 2 psi no doubt due to less back pressure.

The engine is a Spool 3.4 Stroker with a 25 head. The lag difference was pretty well nothing. I'm not sure if I have an old dyno graph with old setup around. I will look for it though. The extra power was at the wheels too.

I am too scared to measure back pressure in the manifold...big cubes(for an RB) and small turbo, im confident the EBP will be spectacular.

Hopefully I covered everything!

Sounds like a nice set up.

How many extra rpm to hit full boost?

SimonR32 Grand Master

SimonR32

Posted
Posted

It's a garrett GT35r that MTA (Mr Turbo Aus @ Gold Coast) rebuilt and put his billet compressor wheel into. Its proving to be quite potent so far. Its pushing some serious flow at low pressures. On the old manifold and housing which was split pulse T3, it made about 600rwhp on 21psi. That was with the 0.82 rear which was clearly too small and choking the crap out of the engine. We just put a Modena 6 Speed Sequential box in it to replace the dead PPG gearset. Now with the sequential box, the IGN cut for flat shift has been killing the turbo gaskets!

So you see we went to v-band manifold and housing to improve reliability and in turn it made another 60rwhp. Most likely, purely because we went up in size with the rear housing, which also increased the boost by 2 psi no doubt due to less back pressure.

The engine is a Spool 3.4 Stroker with a 25 head. The lag difference was pretty well nothing. I'm not sure if I have an old dyno graph with old setup around. I will look for it though. The extra power was at the wheels too.

I am too scared to measure back pressure in the manifold...big cubes(for an RB) and small turbo, im confident the EBP will be spectacular.

Hopefully I covered everything!

Looks nice and responsive! Is it 4.11 ratios with relatively normal sized tyres?

Just trying to get a rough gauge of road speed vs rpm

r33_racer Grand Master

r33_racer

Posted
Posted

Not sure if there was any difference in rpm to achieve full boost. We were using the data logs in the ecu to determine most of everything and it looked to be much the same. To compare if anyone was interested, I am pretty sure the data log said we were making 15psi around 3200rpm and 23psi around 3600rpm.

The diff ratio is 3.7. We did runs in a few different gears to see if there was any difference as this gearbox 1:1 is 6th gear. Difference was pretty well bugger all, about 5-10 horsepower with much the same curve everywhere. I was expecting it to be alot different. I guess because the ratios are so close for 4/5 and 6th gear it ended up much the same.

The tires were 641.7mm diameter roughly. Rolling circumference 1953.13mm. I was working it out backwards this morning to see what it was roughly in engine rpm.

r33_racer Grand Master

r33_racer

Posted
Posted

Yeh the methanol helps, but it also helps keep the temps under control. Plus it's cheap. Took a little while to nut out a good fuel system that can handle the methanol reliably. The mechanical fuel pump works a treat!

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