561.1hp and 558.4tq, PUMP GAS..at 17psi
#102
Very impressive numbers! Can't wait to see some videos beating down Supras
Kyle, would increasing the displacement of the VQ noticeably increase torque down low even with FI? Can your company stroke or bore the VQ? Thanks in advance.
Kyle, would increasing the displacement of the VQ noticeably increase torque down low even with FI? Can your company stroke or bore the VQ? Thanks in advance.
#103
Originally posted by gq_626
And how does the car sound at idle? how about on a cold start? Are the pistons louder than stock. Cold vs. warm?
And how does the car sound at idle? how about on a cold start? Are the pistons louder than stock. Cold vs. warm?
#104
Originally posted by Kyle(Houston)
I can't wait
I heard your Cousin was *very* impressed
Kyle
SGP Racing
I can't wait
I heard your Cousin was *very* impressed
Kyle
SGP Racing
#105
Originally posted by kudos
GQ, i haven't driven the car yet so i don't know, you should ask kyle or mark, but everyone that has driven the car has said that its almost as smooth as stock.
GQ, i haven't driven the car yet so i don't know, you should ask kyle or mark, but everyone that has driven the car has said that its almost as smooth as stock.
Seriously?! That is terrific if Kyle can confirm it.
Paging Kyle.....beep...beep...beep
#106
Originally posted by kudos
GQ, i haven't driven the car yet so i don't know, you should ask kyle or mark, but everyone that has driven the car has said that its almost as smooth as stock.
GQ, i haven't driven the car yet so i don't know, you should ask kyle or mark, but everyone that has driven the car has said that its almost as smooth as stock.
I don't know about how the Arias are going to do though. We used Arias in a few 300zx motors we built and they were pretty noisey. That's why we do not use them in our motors.
Kyle
SGP Racing
#107
The Aris pistons use either 2618 non-silicon aluminum, or 4032 High Silicon aluminum. The ones for the 350Z are the 4032 High Silcon Aluminum, which significantly reduces heat expansion and should make for a much quiter forged operation.
If you use the 2618 non-silicon aluminum, they will likely be noiser.
Do you know what type of aluminum they use in your setup? It also depends heavily on how the engine is installed, and insuring proper clearances and balancing.
Here is some info I googled regarding hi vs low silicon content.
_________________________________________________
Early in the peace it was common for US forged-piston materials to contain only 7 per cent silicon in their make-up. This led to high temperature expansion rates, making engines sound 'rattly' when started cold. The Germans came to the rescue here with new materials for forged pistons which did away with the undesirable expansion rates, by containing a much more acceptable 14 per cent silicon content. As some top-level German cars have forged pistons standard (BMW V8, V12 ect) it was a requirement that these engines remained smooth and quiet, even when cold - hence the development of better materials. Now, a lot of the aftermarket forged-piston manufactures have caught on and are offering the 'quieter' high silicon content alloy.
If you use the 2618 non-silicon aluminum, they will likely be noiser.
Do you know what type of aluminum they use in your setup? It also depends heavily on how the engine is installed, and insuring proper clearances and balancing.
Here is some info I googled regarding hi vs low silicon content.
_________________________________________________
Early in the peace it was common for US forged-piston materials to contain only 7 per cent silicon in their make-up. This led to high temperature expansion rates, making engines sound 'rattly' when started cold. The Germans came to the rescue here with new materials for forged pistons which did away with the undesirable expansion rates, by containing a much more acceptable 14 per cent silicon content. As some top-level German cars have forged pistons standard (BMW V8, V12 ect) it was a requirement that these engines remained smooth and quiet, even when cold - hence the development of better materials. Now, a lot of the aftermarket forged-piston manufactures have caught on and are offering the 'quieter' high silicon content alloy.
Last edited by Sharif@Forged; 08-04-2004 at 06:58 AM.
#108
Hey Kyle,
If I remember correclty didn't you also replace the stock oil pump on Kudus's car? I was curious as to why you have done this, did you feel it was necessary? Also, I was curious if you have done anything to the ignition to upgrade it? Thanks.
If I remember correclty didn't you also replace the stock oil pump on Kudus's car? I was curious as to why you have done this, did you feel it was necessary? Also, I was curious if you have done anything to the ignition to upgrade it? Thanks.
#109
Oh, one more thing, the JE/SRP Pistons that SGP offers (I think they are JE/SGP pistons?) are made of the exact same material as the Arias...either 2618 or 4032 alumuminum. not sure which onces SGP elected for their application.
So if SGP's are quite...the Arias will be just as quite. Don't want my group buy people to be worried about that.
So if SGP's are quite...the Arias will be just as quite. Don't want my group buy people to be worried about that.
Last edited by Sharif@Forged; 08-04-2004 at 05:51 PM.
#110
Originally posted by gq_626
Oh, one more thing, the JE/SRP Pistons that SGP offers (I think they are JE/SGP pistons?) are made of the exact same material as the Arias...either 2618 or 4032 alumuminum. not sure which onces SGP elected for their application.
So if SGP's are quite...the Arias will be just as quite. Don't want my group buy people to be worried about that.
Oh, one more thing, the JE/SRP Pistons that SGP offers (I think they are JE/SGP pistons?) are made of the exact same material as the Arias...either 2618 or 4032 alumuminum. not sure which onces SGP elected for their application.
So if SGP's are quite...the Arias will be just as quite. Don't want my group buy people to be worried about that.
I highly recommend finding a shop that has a torque plate for the boring of the cylinders to ensure a round bore. Especially since the VQ35 has an open deck.
Kyle
SGP Racing
#111
Originally posted by ZxRage
Hey Kyle,
If I remember correclty didn't you also replace the stock oil pump on Kudus's car? I was curious as to why you have done this, did you feel it was necessary? Also, I was curious if you have done anything to the ignition to upgrade it? Thanks.
Hey Kyle,
If I remember correclty didn't you also replace the stock oil pump on Kudus's car? I was curious as to why you have done this, did you feel it was necessary? Also, I was curious if you have done anything to the ignition to upgrade it? Thanks.
Well the car is going to Doha, Qatar when we are done so we did everything to make sure the customer did not have to worry once he got the car. It is hard to find parts where he is located
No ignition upgrades were done.
Kyle
SGP racing
#112
Originally posted by Kyle(Houston)
They are not JE pistons. All the turbo pistons we have made are made of 2618. 2618 is a better material for boosted cars due to its high temperature and high cylinder pressure from FI. The noise has more to do with the design of the piston and the installation of the piston then what it is made from.
I highly recommend finding a shop that has a torque plate for the boring of the cylinders to ensure a round bore. Especially since the VQ35 has an open deck.
Kyle
SGP Racing
They are not JE pistons. All the turbo pistons we have made are made of 2618. 2618 is a better material for boosted cars due to its high temperature and high cylinder pressure from FI. The noise has more to do with the design of the piston and the installation of the piston then what it is made from.
I highly recommend finding a shop that has a torque plate for the boring of the cylinders to ensure a round bore. Especially since the VQ35 has an open deck.
Kyle
SGP Racing
In terms of noise, the biggest factor is the thermal expansion characteristics, and the clearances required. No question about that. I loose piston will make more noise than a tight one...all thing being equal. Yes, ring design, and other factors can effect the noise.
The good news is since your motor was very quite with 2618, then then 4032 should fine as well. I agree that a torque plate should be required material when building this motor. 90% of shops will send their motor out to be machined, assembled and balanced, so this usually isnt a problem...but I will make sure they have a torque plate for the VQ.
#113
Kyle/Mark,
Can you tell what kind of fuel mileage the car is getting at the 8.5:1 compression? On my Greddy kit a 9psi, I getting about 20mpg average. What could I expect with 8.5:1 compression at the 750cc injectors? Any ideas?
Can you tell what kind of fuel mileage the car is getting at the 8.5:1 compression? On my Greddy kit a 9psi, I getting about 20mpg average. What could I expect with 8.5:1 compression at the 750cc injectors? Any ideas?
Thread
Thread Starter
Forum
Replies
Last Post
MyZ2Slow
Mid-Atlantic Marketplace
0
09-09-2015 10:17 PM