Whoretown - Now Interest Free

[Nismo_Boy]

no reason those turbs wont make 780bhp+ with the right setup (they are the turbs im using)

Interesting...

So in theory if the motor is as good as what im told, there is no reason why it couldnt be a 600rwhp car, or there abouts.

Edited April 12, 2007 by Nismo_Boy

[shanef]

Interesting...

So in theory if the motor is as good as what im told, there is no reason why it couldnt be a 600rwhp car, or there abouts.

on ~20psi yes, it'll piss it in

on a side note, dirtgarage is building his new motor with GTRS strapped to the side, will be interesting to compare his dyno graph to mine

[Nismo_Boy]

on ~20psi yes, it'll piss it in

on a side note, dirtgarage is building his new motor with GTRS strapped to the side, will be interesting to compare his dyno graph to mine

I was thinking more like 2bar to be honest...

Dirt and you will be a good compo, so many tough cars and i have nothing life isnt fair

[shanef]

I was thinking more like 2bar to be honest...

Dirt and you will be a good compo, so many tough cars and i have nothing life isnt fair

from my research, boost is just a restriction, and the more u feed in the more restriciton u have, match the right head, cams and pipework to the turbo's, and u wont have to wind in as much boost, for example sydneykid has a car down nsw that makes over 800bhp with GTRS on 1.5bar

[Nismo_Boy]

from my research, boost is just a restriction, and the more u feed in the more restriciton u have, match the right head, cams and pipework to the turbo's, and u wont have to wind in as much boost, for example sydneykid has a car down nsw that makes over 800bhp with GTRS on 1.5bar

You make an interesting point, so your saying boost creates friction thus friction creates restriction or something along those lines? First I've heard, I guess it could make sense, I just duno as I've never researched it.

In saying that though, with a mid level built head, wouldn't more boost be better, as you can push the extra air into it?

[shanef]

You make an interesting point, so your saying boost creates friction thus friction creates restriction or something along those lines? First I've heard, I guess it could make sense, I just duno as I've never researched it.

In saying that though, with a mid level built head, wouldn't more boost be better, as you can push the extra air into it?

say if ur head only flows 500cfm, and tune the boost for this 500cfm, and then decide u want more power so u mind in more boost, create an effective 550cfm, the motors going to be working alot harder to get that extra 50cfm through cmopared to a head that can flow 600cfm, and will create more heat etc etc.

i'll paste the PM SK sent me regarding these issues:

Let's start off with AFMs, the right sized ones are never a restriction. AFM's are simply the best way to tune a car, far better than MAP sensors as a load reference. So if you think that by going to a MAP sensor driven ECU you are achieving a better result, then you are mistaken. An example. the Apexi works drag car (V Max as it is known) makes over 1,100 bhp, runs high 8's at 150 mph and it runs AFM's (2 x Q45's to be precise).

HKS rate the GTRS's at

HKS rating is usually around 10% below what the turbo is actually capable of. An example, the Dirt Garage R32GTR achieved 443 rwkw (~700 bhp) out of 2 x 2530's (rated at 320 bhp each). Since HKS rate the GTRS's at 350 bhp each, then around 760 bhp is achievable.

More airflow at the lowest possible boost depends on getting the air in as efficiently as possible, using it efficiently while it being conbusted and then getting it out as efficiently as possible.

Some of the restrictions you are going to see when aiming for that sort of power;

1. Exhaust will need to be 4" from the dump pipe joining point rearwards (that includes the cat). This means it will never be street legal at 750 bhp.

2. Intercooler will need to be at least 100 mm think (x 600 mm x 300 mm). Single entry or twin entry makes no difference as long as it is done right. Keep the gas velocity up, don't make the pipework larger than 55mm from each turbo. Them no larger than 90 mm from the intercooler to the plenum (80 mm is better).

3. The cylinder head will require extensive porting, including carefull matching of the inlet and exhaust manifolds.

4. Speaking of exhaust manifolds, they will need to be matched to the turbos flow and physical dimensions

5. The standard throttle bodies are OK at 750 bhp, but the plenum looses its flow balance over 65 lbs of air per minute and you get hard to tune individual cylinders. Hence the need for the Nismo plenum.

6. The cams will need substantial lift, at least 10.3 mm minimum, the duration is up to your choice of rpm range. I would suggest around 272 degrees, for both inlet and exhaust. Obviously that means valve springs as well as machining the cylinder head to clear the high lift lobes.

7. You will need to replace the exhaust valves, stainless and at least 0.5 mm larger than standard, preferably 1 mm. Inlet valves not as critical, if they need replacing, go for a 0.5 mm upgrade.

8. Be very carefull with mucking up the standard squish by running poorly designed pistons or thick head gaskets. Nissan got the squish zones just right, so don't screw with them.

In summary look at everything between the turbo compressor outlet and the exhaust tip as a potential restriction.

Cheers

Gary

[Nismo_Boy]

That all makes sense. Minus AFM's look f**king ugly

[shanef]

That all makes sense. Minus AFM's look f**king ugly

plus they cost a f**king fortune

[Nismo_Boy]

plus they cost a f**king fortune

Yeah that too

[shanef]

indeed

cant wait for next week. pick up clutch, and trailor car to workshop for the exhaust

[Nismo_Boy]

indeed

cant wait for next week. pick up clutch, and trailor car to workshop for the exhaust

Fun times, great exhaust note

[shanef]

Fun times, great exhaust note

thats the plan, screamers and no cat

these next 3 weeks are gonna go sooo slow i reckon

[Nismo_Boy]

thats the plan, screamers and no cat

these next 3 weeks are gonna go sooo slow i reckon

Siff not go full ti system, screamers, dumps into 4 inch, then twin 3inch spliter at the rear seat, to out the back. No cat, no muffler, no cannon. Nothing. Just pipe

[shanef]

Siff not go full ti system, screamers, dumps into 4 inch, then twin 3inch spliter at the rear seat, to out the back. No cat, no muffler, no cannon. Nothing. Just pipe

too bad ti is expensive as f**k, plus i live in ipswich mate, and still want to do some hill 'cruises' etc, so im sure the po po wont like straight pipe

[Nismo_Boy]

too bad ti is expensive as f**k, plus i live in ipswich mate, and still want to do some hill 'cruises' etc, so im sure the po po wont like straight pipe

Bah straight pipe, I ran around for 3 months with my rb20 with straigh pipe in noosa. only made it to a month with the quick R32 just running a dump pipe

[shanef]

Bah straight pipe, I ran around for 3 months with my rb20 with straigh pipe in noosa. only made it to a month with the quick R32 just running a dump pipe

lol top effort

[Nismo_Boy]

lol top effort

What can I say, I have a fetish for the truck like rb note you get with straight pipes <3

[shanef]

What can I say, I have a fetish for the truck like rb note you get with straight pipes <3

yeah i like em too, but what i dont liek is the sound when u have ur pipes exit out under the pass door i.e mark jacobson's car

[Nismo_Boy]

yeah i like em too, but what i dont liek is the sound when u have ur pipes exit out under the pass door i.e mark jacobson's car

I havent heard his car, the moive u have seen of my car on you tube was just the dump pipe, sounded alright, they need some length in the pipe to get a note if you not running mufflers though

[shanef]

I havent heard his car, the moive u have seen of my car on you tube was just the dump pipe, sounded alright, they need some length in the pipe to get a note if you not running mufflers though

agreed!