new FAST
02-05-2008, 09:00 PM
#1
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new FAST I know it just came out, but i, along with alot of people im sure are dying to see the results on the ported FAST 92/92 vs the FAST 90/90. If anyone could do this it would be ggggreatly appreciated
02-09-2008, 10:44 AM
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I dont think we will see a comparo any time soon. It just came out, and people who have the 90mm version are not dying for the extra 2 mm and people who have stock Intakes are going to go straight for a 92 mm. We can only hope we see two dynos of cars who have the same mods on similar climate and see whats up.
02-09-2008, 01:50 PM
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No its very possible a shop who carry both or what not, do it for comparison/marketing purposes. Now wether it makes any signifigant gain or not, will dictate wether we see that graph or not. lol
02-11-2008, 01:34 AM
#7
If the changes only include a larger front opening (airflow related changes), I wouldnt be too concerned about the new manifold making any more power than the 90mm unit. The restriction is not at the entrance of the intake....its further down the line mainly associated with its inherent up and over runner design. Making the opening larger isnt the answer but it certainly is good marketing. It does have some other nice perks such as stainless hardware, a revised O-Ring groove, and finally inserts in the TB flange, all of which makes it a nicer piece, but as far as additional ponies are concerned I wouldnt hold my breath.
Condsider this....going from a ported 78 to a ported 90 was worth 5 RWHP assuming both manifolds were ported. Thats a 30% increase in throttle blade area and a situation where the 78 mm TB blade may have been a restriction in the pipeline if you had a good airbox, a larger 85mm MAF, etc. etc. Now we are already at 90mm and only picking up 6% more TB blade area, BUT, there are other restrictions such as a MAF and airlid that are already not flowing what the 90mm TB is capable of.
Bottom line, assuming no changes in runner design (which I believe to be the case), if its worth a single HP I will honestly be surprised.
Tony
Condsider this....going from a ported 78 to a ported 90 was worth 5 RWHP assuming both manifolds were ported. Thats a 30% increase in throttle blade area and a situation where the 78 mm TB blade may have been a restriction in the pipeline if you had a good airbox, a larger 85mm MAF, etc. etc. Now we are already at 90mm and only picking up 6% more TB blade area, BUT, there are other restrictions such as a MAF and airlid that are already not flowing what the 90mm TB is capable of.
Bottom line, assuming no changes in runner design (which I believe to be the case), if its worth a single HP I will honestly be surprised.
Tony
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02-11-2008, 07:34 AM
#8
If the changes only include a larger front opening (airflow related changes), I wouldnt be too concerned about the new manifold making any more power than the 90mm unit. The restriction is not at the entrance of the intake....its further down the line mainly associated with its inherent up and over runner design. Making the opening larger isnt the answer but it certainly is good marketing. It does have some other nice perks such as stainless hardware, a revised O-Ring groove, and finally inserts in the TB flange, all of which makes it a nicer piece, but as far as additional ponies are concerned I wouldnt hold my breath.
Condsider this....going from a ported 78 to a ported 90 was worth 5 RWHP assuming both manifolds were ported. Thats a 30% increase in throttle blade area and a situation where the 78 mm TB blade may have been a restriction in the pipeline if you had a good airbox, a larger 85mm MAF, etc. etc. Now we are already at 90mm and only picking up 6% more TB blade area, BUT, there are other restrictions such as a MAF and airlid that are already not flowing what the 90mm TB is capable of.
Bottom line, assuming no changes in runner design (which I believe to be the case), if its worth a single HP I will honestly be surprised.
Tony
Condsider this....going from a ported 78 to a ported 90 was worth 5 RWHP assuming both manifolds were ported. Thats a 30% increase in throttle blade area and a situation where the 78 mm TB blade may have been a restriction in the pipeline if you had a good airbox, a larger 85mm MAF, etc. etc. Now we are already at 90mm and only picking up 6% more TB blade area, BUT, there are other restrictions such as a MAF and airlid that are already not flowing what the 90mm TB is capable of.
Bottom line, assuming no changes in runner design (which I believe to be the case), if its worth a single HP I will honestly be surprised.
Tony
02-11-2008, 02:40 PM
#12
Since we are talking about flow and restrictions, I noticed something this weekend while doing some tuning and data logging.
I did a 2nd gear roll from 3000 rpm and noticed that I only saw a max MAP flow of 97 / 98kPa, which by all accounts, says I'm still pulling vaccum, even at 7000 rpm (actually it was 6983). Is this possible? I have a Vengeance ported 90/90 setup, so that's not the restriction as well as an 85mm descreened maf and an 85mm lid. My air filter is new, so that's not the issue. Should I even be worried?
Thanks for letting me sidetrack this post, since it's still slightly still on topic.
I did a 2nd gear roll from 3000 rpm and noticed that I only saw a max MAP flow of 97 / 98kPa, which by all accounts, says I'm still pulling vaccum, even at 7000 rpm (actually it was 6983). Is this possible? I have a Vengeance ported 90/90 setup, so that's not the restriction as well as an 85mm descreened maf and an 85mm lid. My air filter is new, so that's not the issue. Should I even be worried?
Thanks for letting me sidetrack this post, since it's still slightly still on topic.
02-13-2008, 08:34 AM
#15
Thanks for the replies guys. It was more of a curiosity and observation than anything. I'm totally happy about the combination of the recent additions of the the Vengeance ported FAST, 85mmf maf and intake lid.
Just for curiosity sake, I opened a log session made prior to the intake swaps and noticed that I was seeing 92 - 90 kpa from 5600-6800 with the ls6 intake and factory throttle body as well as the stock descreened maf and lid combo. So that's a pretty big jump up to the 98kpa that I recently witnessed. At least I know the intake isn't a restriction anymore.
Just for curiosity sake, I opened a log session made prior to the intake swaps and noticed that I was seeing 92 - 90 kpa from 5600-6800 with the ls6 intake and factory throttle body as well as the stock descreened maf and lid combo. So that's a pretty big jump up to the 98kpa that I recently witnessed. At least I know the intake isn't a restriction anymore.