78MM versus 85MM MAF versus larger
07-20-2008, 04:48 PM
#1
Racer
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78MM versus 85MM MAF versus larger
I have a 2000 Vert with a stock 78MM MAF... considering upgrading to an 85MM from a newer car. Couple questions, will I gain any power, will I gain any throttle response and will I need a tune. In the long run I plan to do heads in cam... in the short run I have a Vararam sitting in the garage ready to stick on. Thanks!!!
07-20-2008, 06:59 PM
#3
Le Mans Master
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I have a 2000 Vert with a stock 78MM MAF... considering upgrading to an 85MM from a newer car. Couple questions, will I gain any power, will I gain any throttle response and will I need a tune. In the long run I plan to do heads in cam... in the short run I have a Vararam sitting in the garage ready to stick on. Thanks!!!
07-20-2008, 07:48 PM
#4
Le Mans Master
Dead on good advice!
07-21-2008, 12:46 PM
#5
Drifting
You will need a bigger air bridge, the stock one will not really fit on the 85mm MAF and will leak and cause you tune issues. Not sure if you will need a new coupler to the vararam or not, fit them together before putting them on to see if they fit together.
And, as stated, you will need a tune.
Maybe look at a LS6 intake before doing a MAF.
And, as stated, you will need a tune.
Maybe look at a LS6 intake before doing a MAF.
07-21-2008, 12:55 PM
#6
Racer
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Makes sense.. I had sort of planned on possibly doing the air bridge, MAF and LS6 intake (possibly with the 90MM TPIS upgrade) at some point down the line. Thanks as you guys backed my thought process on this one.
07-21-2008, 01:50 PM
#7
Keep in mind the volume of air the system can flow will be limited by the smallest piece. So the 78mm throttlebody in this case would be the choke point. If you decide to go with a 90mm TB setup then the 85mm MAF should be done along with the bigger air bridge.
07-21-2008, 04:32 PM
#8
Burning Brakes
sorry fore high jacking the post but I have a 97 that I just purchased ls6 intake manifold, I’m gone use my stock 78 MM TB, should I get a bigger TB? what size is my MAF 78 MM also ? is there a bigger MAF and TB an a different year car ?
the question is what else should I do for the best results since I have the tb and intake and all the things out of the car I will do it all at once.
these are my mods:
Dual Airflow Intake System, LS6 intake manifold. Corsa touring exhaust, Bassani Crossover X Pipe
Z06 Rear differential (3:42),
possible future mods a NOS 100-150 shot, possibly a cam
the question is what else should I do for the best results since I have the tb and intake and all the things out of the car I will do it all at once.
these are my mods:
Dual Airflow Intake System, LS6 intake manifold. Corsa touring exhaust, Bassani Crossover X Pipe
Z06 Rear differential (3:42),
possible future mods a NOS 100-150 shot, possibly a cam
07-21-2008, 05:21 PM
#9
All years of C5's used the 78mm throttlebody. '01+ cars used the larger 85mm MAF (which also eliminated the IAT sensor). For your planned mods the LS6 intake along with the stock TB/MAF will work just fine.
07-21-2008, 07:22 PM
#10
Le Mans Master
07-22-2008, 03:46 PM
#13
A Z06 does have an 85mm MAF (the same as all '01+ cars). The only difference is that the Z06 MAF has had it's screen removed and uses a slightly different MAF table to compensate.
Power wise I'd say you could comfortably hit around the 450rwhp range with a big cam, LS6 intake and the 78mm TB/MAF. Once you start trying for big numbers on a 346 then a FAST 90, 90mm TB, 85mm MAF and the requisite ducting changes become worth it.
Power wise I'd say you could comfortably hit around the 450rwhp range with a big cam, LS6 intake and the 78mm TB/MAF. Once you start trying for big numbers on a 346 then a FAST 90, 90mm TB, 85mm MAF and the requisite ducting changes become worth it.
07-22-2008, 06:08 PM
#14
Former Vendor
The 85mm maf becomes a restriction at ~ 450 rwhp.
At 500 rwhp, going to an LS7 style maf, or the LPE 100mm MAF will net roughly 11 rwhp. I have seen as much as 15, and as little as 8.
just some data points, we upgrade 90% of the cars that come through here to a larger maf
At 500 rwhp, going to an LS7 style maf, or the LPE 100mm MAF will net roughly 11 rwhp. I have seen as much as 15, and as little as 8.
just some data points, we upgrade 90% of the cars that come through here to a larger maf
07-22-2008, 07:37 PM
#15
Melting Slicks
The 85mm maf becomes a restriction at ~ 450 rwhp.
At 500 rwhp, going to an LS7 style maf, or the LPE 100mm MAF will net roughly 11 rwhp. I have seen as much as 15, and as little as 8.
just some data points, we upgrade 90% of the cars that come through here to a larger maf
At 500 rwhp, going to an LS7 style maf, or the LPE 100mm MAF will net roughly 11 rwhp. I have seen as much as 15, and as little as 8.
just some data points, we upgrade 90% of the cars that come through here to a larger maf
07-22-2008, 08:01 PM
#16
Former Vendor
It all depends on what you want to do with the car. an 85mm MAF is worth about 3-5 hp at the 400 rwhp level. Every little bit counts.
If you enjoy the car, have the stock throttle body on it, and the stock LS1 or LS6 intake, the 75 would probably suit you just fine.
If you enjoy the car, have the stock throttle body on it, and the stock LS1 or LS6 intake, the 75 would probably suit you just fine.
07-22-2008, 08:48 PM
#17
Melting Slicks
Louis, what if you have an LS6 MAF and manifold , how much gain would you get going with a larger MAF and manifold if you are under 450RWHP? From reading your posts I get the feeling that $$ isn't worth the added HP all things being equal.......
Last edited by stormrider; 07-22-2008 at 09:08 PM.
07-22-2008, 09:47 PM
#18
Instructor
The 85mm maf becomes a restriction at ~ 450 rwhp.
At 500 rwhp, going to an LS7 style maf, or the LPE 100mm MAF will net roughly 11 rwhp. I have seen as much as 15, and as little as 8.
just some data points, we upgrade 90% of the cars that come through here to a larger maf
At 500 rwhp, going to an LS7 style maf, or the LPE 100mm MAF will net roughly 11 rwhp. I have seen as much as 15, and as little as 8.
just some data points, we upgrade 90% of the cars that come through here to a larger maf
Mark
07-24-2008, 02:00 PM
#19
Former Vendor
The MAF in the ZR1 is based in the actual Air cleaner assembly. It equates to a ~ 105mm round tube. I have 3 customers with them on order, 2 are being shipped to me and the other is the bosses... Ill have dyno numbers as SOON as one arrives
Storm- You would gain ~ the same percentage. 3-5 hp, but for the increase in price and added work, it may not be worth it to some. The HP gained per dollar spent is very high with it, but some still do it
Louis
Storm- You would gain ~ the same percentage. 3-5 hp, but for the increase in price and added work, it may not be worth it to some. The HP gained per dollar spent is very high with it, but some still do it
Louis
07-24-2008, 02:05 PM
#20
Melting Slicks
The MAF in the ZR1 is based in the actual Air cleaner assembly. It equates to a ~ 105mm round tube. I have 3 customers with them on order, 2 are being shipped to me and the other is the bosses... Ill have dyno numbers as SOON as one arrives
Storm- You would gain ~ the same percentage. 3-5 hp, but for the increase in price and added work, it may not be worth it to some. The HP gained per dollar spent is very high with it, but some still do it
Louis
Storm- You would gain ~ the same percentage. 3-5 hp, but for the increase in price and added work, it may not be worth it to some. The HP gained per dollar spent is very high with it, but some still do it
Louis