What's a good A/R combination?
Originally Posted by obZidian
Navy Dave: That is with the 408ci right? Can i ask why you didn't go with a larger turbo?
David
Originally Posted by nitrorocket
You have a 408, he has a 346. That makes a good bit of difference for A/R needs.
Originally Posted by Navy David SS
Spool time. I built the car to drag race. Figured we could get the twin 67's to spool at 3500-4000 - which it does. My drive train will not take much more than the 1000rwhp that my car is tuned for. The twin have a capability of making 1200-1300 rwhp with the 408. If we now get the suspension and traction figured out, we will be in the 8's -- mid-to low 8's
David
David
) Do you think that if i ran a set of the super t70's or t72's with a similar .96 a/r, I will have peak boost before 4500rpm or at 4500rpm.? I ask becuz i want to have a turbo selection that will maintain my power levels in the future without having to spend the same dollars twice. I also want to run a a2a setup. Im also not 100% sure that my 4l80e will take more then 1000rwhp but i would like to see if i can.
What are you gonna do for suspension? You seem to be doing well, those track bars come i handy?
Originally Posted by DrTurbo
An .85 is an on-center housing. I don't think I would want an .85 on-center on an LS1. Tons of backpressure.
So try to swap out the exhaust housing with a .96?
I've never modified any of my turbos so pardon if that's a newbie question
Here is a shot of the housing, does that not look like tangential? (serious question):
Last edited by PPI Typhoon; Jul 13, 2006 at 09:28 AM.
Originally Posted by PPI Typhoon
Thanks for the response.
So try to swap out the exhaust housing with a .96?
I've never modified any of my turbos so pardon if that's a newbie question
Here is a shot of the housing, does that not look like tangential? (serious question):
So try to swap out the exhaust housing with a .96?
I've never modified any of my turbos so pardon if that's a newbie question
Here is a shot of the housing, does that not look like tangential? (serious question):
Originally Posted by obZidian
By "spool" do you mean peak boost or initial boost? (kinda stupid question but i can't help it sometimes )
Do you think that if i ran a set of the super t70's or t72's with a similar .96 a/r, I will have peak boost before 4500rpm or at 4500rpm.? I ask becuz i want to have a turbo selection that will maintain my power levels in the future without having to spend the same dollars twice. I also want to run a a2a setup. Im also not 100% sure that my 4l80e will take more then 1000rwhp but i would like to see if i can.
What are you gonna do for suspension? You seem to be doing well, those track bars come i handy?
) Do you think that if i ran a set of the super t70's or t72's with a similar .96 a/r, I will have peak boost before 4500rpm or at 4500rpm.? I ask becuz i want to have a turbo selection that will maintain my power levels in the future without having to spend the same dollars twice. I also want to run a a2a setup. Im also not 100% sure that my 4l80e will take more then 1000rwhp but i would like to see if i can.
What are you gonna do for suspension? You seem to be doing well, those track bars come i handy?
I'm no turbo expert. Maybe someone can help on the 70 or 72 spooling. My builder/tuner recommended the 67's and so far so good.
Ask your builder of the 4l80e wheather it will or will not take 1000. I know I am concerned on my T-400. It was built for 1K but you never know.
Suspension. Hopefully I'm done with it. C/M K-mem & A-arms, w/QA1 shocks and their race spring in front; Wolfe race sway bar, 1 off custom TQ arm, QA1 shocks and stock (shortened) springs in back. Best so far on very very little boost 1.41; on nitrous with same set up did a best of 1.34 on a 200 shot. I guess the weekest part of the entire car is the original/stock backs front and back
David
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That is where the major difference in A/R comes in. For comparison, You get 7 psi @ 4500rpm..........My 347 with .68 A/R gets 16 psi by about 3500 rpm.
I mentioned this just for a comparison.
I mentioned this just for a comparison.
Originally Posted by Navy David SS
Really?? I'm running twin 67's with .96 A/R. Boost comes in at about 3500, carries to red line (what ever I want, right now 6800, but easily could be 7200). No problems what so ever on getting boost. NO LAG. Launch off trans-brake is fun again. My HP and times are in my signature.
David
David
Hoping for around 1200-1300hp crank
That is where the major difference in A/R comes in. For comparison, You get 7 psi @ 4500rpm..........My 347 with .68 A/R gets 16 psi by about 3500 rpm.
thanks
eddie
Originally Posted by sytyjedi
Hey Dan, I switched to a .96 on my PT67 for the LS1. I can't see your pic (my network) but I can send you some pics of before/after. It's very easy to swap housings.
Where is a good source for housings??
Also pics would be great.
hanisch_dan@hotmail.com
Thanks for the response!
On center is a housing where the exhaust inlet is centered wit the centerline og the turbo shaft. Tangenial is offset and give the exhaust a straight shot directly to the turbine. A Tang housing is supposed to be good for 5-10% more power. The downside is that you cannot mount the turbos with a symetrical look. One turbo will sit way up and one way down, unless the headers are built to accomodate. But then you still don't have a symitrical look if thats what you want.
Originally Posted by PPI Typhoon
Ok, well that's good news. This is the turbo I got from Nolan up in Canada. Ball bearing center section T76 for $1000. I would hate to have to give it up.
Where is a good source for housings??
Also pics would be great.
hanisch_dan@hotmail.com
Thanks for the response!
Where is a good source for housings??
Also pics would be great.
hanisch_dan@hotmail.com
Thanks for the response!
Originally Posted by DrTurbo
Call us we can get you any housing you need.
Dan, I got a T4 tang undivided housing, T4 flange, v-band clamp and starter section for the downpipe from Forced Inductions.
Originally Posted by sytyjedi
I got my housing from ya'll and would recommend anyone else do the same.
Dan, I got a T4 tang undivided housing, T4 flange, v-band clamp and starter section for the downpipe from Forced Inductions.
Dan, I got a T4 tang undivided housing, T4 flange, v-band clamp and starter section for the downpipe from Forced Inductions.