freestylzz
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Oct 18, 2013
Hey fellas I have a stock mass air unit (Bosch) in my '87 (pictured was the LB9). I've dropped an L98 with the works in there just recently. I know the car is wanting more air. Where can I get a larger aftermarket unit?? I dropped into the local speed shop and was quoted anywhere from b/n $400-$500. I was also told they are pretty hard to get. Is it possible I can fabricate something??
Supreme Member
I think the stock MAF is more than enough. If you really want to do something to it, then remove the screens. I've read that people have run 10's with the stock MAF. If your intake is mostly stock then you will not gain anything with a bigger MAF. Spend that $$ on modding the intake or throttlebody.
Senior Member
Yeah the stock MAF is not holding you back by any stretch.
It looks like you got headers already which was a good choice.
I'm not sure what your goals are but I would either buy an aftermarket base or save up for a complete setup (Miniram, Stealth Ram or SuperRam). A different cam obviously helps too (not sure which on you have) but you should really get one that will matche your intake setup.
It looks like you got headers already which was a good choice.
I'm not sure what your goals are but I would either buy an aftermarket base or save up for a complete setup (Miniram, Stealth Ram or SuperRam). A different cam obviously helps too (not sure which on you have) but you should really get one that will matche your intake setup.
Supreme Member
I have to say that your intake/heads/cam should be optimized...if that is the stock TPI...ditch the bich...
freestylzz
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Oct 18, 2013
Well actually here's the L98 I recently dropped in. Edelbrock hi-flow intake, Edelbrock Performer Aluminum heads, 58mm intake, comp cam, fuel pressure reg, rollerrockers, forged pistons ( I can go on). Can I still use the stock air intake or would it be beneficial to get a larger aftermarket unit??
freestylzz
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Oct 18, 2013
Oops sorry here's the L98 ( picture quality isn't that good).
Senior Member
You can still use the stock one
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The stock MAF sensor is good to arond 450hp once the screens are removed. It flows around 658cfm with the screens out, that's about the max a 350 can swallow at 100% eff. at around 6000rpms. Somebody correct me if I'm wrong, I don't know the exact #'s.
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Quote:
Originally posted by camarojoe
The stock MAF sensor is good to arond 450hp once the screens are removed. It flows around 658cfm with the screens out, that's about the max a 350 can swallow at 100% eff. at around 6000rpms. Somebody correct me if I'm wrong, I don't know the exact #'s.
Originally posted by camarojoe
The stock MAF sensor is good to arond 450hp once the screens are removed. It flows around 658cfm with the screens out, that's about the max a 350 can swallow at 100% eff. at around 6000rpms. Somebody correct me if I'm wrong, I don't know the exact #'s.
Camerojoe...
I made 437.5 RWhp with a gutted stock MAF on my 406. That ~525 fwHP.
This Friday I am taking it back and hoping to get about 450-460 hp out of it. Again with the stock MAF gutted.
A 350 at 100% effiency and 70* air will consume your stated 658CFM at 6500 RPM. The gutted MAF will flow about 750 CFM.
The fact that the inquirer of the post is still running a stock TPI is more the point. He should be shifting that engine at a max of 5000 RPM for best performance. His problems are the intake, manifold and heads before anything else.
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Vader flowed a WELLS MAF (700 SCFM) as compared to stock MAF (500 SCFM).
The Wells MAF comes with only the front screen and a sensor similar to the one that the LT1s come with.
For $166 you can't go wrong so I purchased one.
I haven't had any problems with it considering I've been doing my own PROM tuning.
The Wells MAF comes with only the front screen and a sensor similar to the one that the LT1s come with.
For $166 you can't go wrong so I purchased one.
I haven't had any problems with it considering I've been doing my own PROM tuning.
Quote:
However, for a few bucks more they do offer a Wells Gold and the Conrad line that are more of a premium quality. Among these parts is the SU-145 MAF. This is a direct replacement for the Bosch analog MAF on many of our cars ('86-'89) but shares many of the features of the LT1-style MAF, such as a thick film sensor instead of a hot wire, no heat sink, larger I.D. housing, and a single flat metal matrix on the inlet instead of the round wire screens as found in the Bosch units. Flow is improved and the survivability of the sensor is nearly thermonuclear-resistant. I have heard from some that the MAF does not mount well in situations where the OEM clamp had been screwed to the MAF housing, but most installations are identical to the original.
Since many have asked where to get one, the factory replied:
"We suggest contacting Neil at World Discounts @ 800-288-6728 or Chris at Ace Warehouse @ 605-342-4710 to purchase any Wells products. If they do not stock an item they will be willing to special order it and will drop ship orders directly to your business or residence."
However, for a few bucks more they do offer a Wells Gold and the Conrad line that are more of a premium quality. Among these parts is the SU-145 MAF. This is a direct replacement for the Bosch analog MAF on many of our cars ('86-'89) but shares many of the features of the LT1-style MAF, such as a thick film sensor instead of a hot wire, no heat sink, larger I.D. housing, and a single flat metal matrix on the inlet instead of the round wire screens as found in the Bosch units. Flow is improved and the survivability of the sensor is nearly thermonuclear-resistant. I have heard from some that the MAF does not mount well in situations where the OEM clamp had been screwed to the MAF housing, but most installations are identical to the original.
Since many have asked where to get one, the factory replied:
"We suggest contacting Neil at World Discounts @ 800-288-6728 or Chris at Ace Warehouse @ 605-342-4710 to purchase any Wells products. If they do not stock an item they will be willing to special order it and will drop ship orders directly to your business or residence."
Quote:
That's almost correct. If you place teh two units side-by-each on the bench and throw the calipers at them, the Wells unit is 3mm larger in the small direction, and about 8mm larger in the long direction (it has a little bit of elliptical shape in the housing). If you talk with the engineers at Wells, they won't tell you that it flows more at the same pressure differential, since they designed it as a direct drop-in replacement. The flow test on a bench tells otherwise. Unfortunately, the bench I used to have access to was only calibrated to 700 SCFM, and the Wells unit didn't hit the 0.1" SP at that flow level, whereas the stock Bosch unit (complete with dead hot wire) flowed to about 580 SCFM at 0.1" WC/SP. The sad part is, as you say, the ECM firmware limit is 255g/S, and tuning is the best way around that.
That's almost correct. If you place teh two units side-by-each on the bench and throw the calipers at them, the Wells unit is 3mm larger in the small direction, and about 8mm larger in the long direction (it has a little bit of elliptical shape in the housing). If you talk with the engineers at Wells, they won't tell you that it flows more at the same pressure differential, since they designed it as a direct drop-in replacement. The flow test on a bench tells otherwise. Unfortunately, the bench I used to have access to was only calibrated to 700 SCFM, and the Wells unit didn't hit the 0.1" SP at that flow level, whereas the stock Bosch unit (complete with dead hot wire) flowed to about 580 SCFM at 0.1" WC/SP. The sad part is, as you say, the ECM firmware limit is 255g/S, and tuning is the best way around that.