ryn28

iTrader: (1)

I was thinking about this and figured I'd put it out there to see what you guys think.

I've been hearing that a high flow MAF equipped TPI can only handle about 400 or so hp before you start having problems,. I've heard that you can't even re-calibrate the computer and have the MAF work effectively without some problems at those hp levels. From what I'm told, the right way to run above the 400hp mark with TPI would be to switch to a Speed/Density type system. So, what's the point of a 1000cfm MAF if you can't use a MAF system at those hp levels?

R.O.B.

The reason you can't use the MAF over 400hp is because it wont flow 1000 CFM.

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Rob
'86 TA 305 TPI
Gutted MAF, Ported Plenum
TB Bypass, Home made Cold Air Intake,
Edelbrock T.E.S.
48psi regulator, (Nickel method)

mult68

iTrader: (1)

All the high-flow MAFs Ive seen have been for LS1 cars (ie Corvettes and 4th Gens)

irocz

We all need to bug granatelli or paxton or whoever it is that is making those oversize MAFs for the 4thgen guys to hook us up. Car Craft had an article a while back that showed a working one they had done, but it was a one-off deal at the time.



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Dan
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87 IROC-Z, 6.7 $uperram & cam, Eagle 5.7" rods, Dart 200cc Iron Eagle heads, auto w/ BTE 3000stall lockup, 3.27, leather, !cat, Holley fpr, K&N'S, SLP 1-3/4" headers, Edelbrock lower intake, Holley 52mm tb, Dynomax\Flowmaster catback.
1987 Camaro Z28 - 5.2tpi, auto, 3.73s, ram air, airfoil, ported plenum, !cat, !tbcoolant, !smog, !4th gear - FOR SALE

Ski89Z28

Well this subject has been gone over and over and ovaer and ...............
Anyway I hope Glenn gets into this one cause I can't explain it as well as him but here goes.
True the MAF flows only so much air but that is not the limiting factor. The cal maps for the prom only got to 255! Now flowing more air can be done but the prom needs to have a value to reference it and as it is now it doesn't.
So the problem tends to be with the prom and ecm.
I know Vader was trying something but then all went quiet about it when he said he had a working model on the bench testing. I guess you need to be in the click .

Hope it helps, but really it won't I know.



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89 IROC 350 Auto
MSD 6AL
Custom DUAL Exhaust
Edelbrock Performer 6085 Aluminum Heads
ZZ9 Cam
TPIS Level 5 Chip
And Free mods.
(stock intake, runners and suspension)

13.879 @ 98.90 mph (with 2.77 gears!)


Moderator of http://www.iroczone.com

ryn28

iTrader: (1)

Ok, so there is possibly a way to make it work but for all our purposes when running a MAF sensor the bigger MAF's and the 1000cfm throttle bodies are basically a waste of money. Looks like I'll have to do what I had originally planned for the future which is going to the speed/density setup.