Turbo size advice for 408
12-07-2007, 12:14 PM
#21
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Cam = 224/231 .595 LSA 114 cam
What do the numbers mean. It is supposed to be a turbo cam.
What A/R should I go with if using the 76 in rear mount form? I am going to go with the 76.
What do the numbers mean. It is supposed to be a turbo cam.
What A/R should I go with if using the 76 in rear mount form? I am going to go with the 76.
12-07-2007, 01:41 PM
#22
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I like the LSA at 114, but I'd reverse that duration. I'd have to agree with Berzerker on the A/R.
12-22-2007, 05:00 AM
#23
Im running a T76/.96AR front mount on a 6.0l. It is a bit laggy for me, but Im at 7000' elevation. It spools really slow compaired to the T66/.81AR I had. If you mat it from a dig it will take 3-4 seconds to come on. On a 408 at low elevation it would be fine. If you are going to run 13-15psi I would go with the T76/.96AR. Under 12psi you might get away with a .81AR. Im afraid anything smaller will choke you up top, and bigger will be kinda laggy. Just my .02$.
12-26-2007, 09:32 AM
#24
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I have bulit quite a few 408's with rear mount's . at 12lbs of boost with a T76/.96 your boarder line in the eff zone of this turbo and with out meth you'll see some high IAT's over 5300 rpm . An 88mm or a GT4202r [ thats whats on my 403 in my tbss ] will be in a very happy place on a 408 . as for spool time CAM is such a big factor . I have had very good result's with the LPE GT-7 cam it idles like stock and combined with my 3200 vig I have zero lag and have some traction issues with AWD . With a T70/.96 it made 580hp and 650 tq to all four tires on a mustang dyno at 9.5 psi . I will dyno new GT4202r this weeka nd post the results.
See video here .
http://www.youtube.com/watch?v=y1RwJCvKACE
See video here .
http://www.youtube.com/watch?v=y1RwJCvKACE
Last edited by ludicrist2500hd; 12-26-2007 at 09:49 AM.
12-26-2007, 10:51 AM
#25
I have bulit quite a few 408's with rear mount's . at 12lbs of boost with a T76/.96 your boarder line in the eff zone of this turbo and with out meth you'll see some high IAT's over 5300 rpm . An 88mm or a GT4202r [ thats whats on my 403 in my tbss ] will be in a very happy place on a 408 . as for spool time CAM is such a big factor . I have had very good result's with the LPE GT-7 cam it idles like stock and combined with my 3200 vig I have zero lag and have some traction issues with AWD . With a T70/.96 it made 580hp and 650 tq to all four tires on a mustang dyno at 9.5 psi . I will dyno new GT4202r this weeka nd post the results.
See video here .
http://www.youtube.com/watch?v=y1RwJCvKACE
See video here .
http://www.youtube.com/watch?v=y1RwJCvKACE
What else have you built?
12-26-2007, 02:13 PM
#26
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My shop will be on here soon as a vendor. We have built a lot of trucks TBSS's , SRT10's, Fullsize GM's . yeh the video is at 5.5 psi total and me leaving at 1psi . I have left from a stop at 6psi but it's not very good for my tires ....LOL
12-27-2007, 08:49 AM
#29
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On my 403 I have swapped between Stock ls2 cam [ 01 zo6] an 02-04 Zo6 cam , and LPE GT7 . I have done this on 4 different C-5's with rear mount's and one C6 with a rear mount what I have found is the longer the exhaust duration is the faster the turbo will spool at least 400-500 rpm sooner on my LPE gt 7 then the 02 ZO6 cam . Peak hp and Tq are 3% higher with the GT7 cam and hit sooner. This seems to work better on remote mount .
12-27-2007, 04:42 PM
#30
On my 403 I have swapped between Stock ls2 cam [ 01 zo6] an 02-04 Zo6 cam , and LPE GT7 . I have done this on 4 different C-5's with rear mount's and one C6 with a rear mount what I have found is the longer the exhaust duration is the faster the turbo will spool at least 400-500 rpm sooner on my LPE gt 7 then the 02 ZO6 cam . Peak hp and Tq are 3% higher with the GT7 cam and hit sooner. This seems to work better on remote mount .
nice info. any comparisons on front mount cam swaps?
we did a swap from a stock 5.3 cam to an 01 z06 cam and gained 100rwhp at the same boost level. no spool time info though since we have a 5000+rpm stall. we got such killer results we had to ask ourselfs how much a 02+ cam would help or an aftermarket grind.
might have to do some serious cam swap dyno thrashing on our next project.