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View Full Version : L76/l92 intake flow numbers

Stang's Bane
March 30th, 2007, 11:36 AM
http://ls1tech.com/forums/showthread.php?t=686006

Some flow results and pics here.

One of the few times that the intake caused the head to back up earlier that I have seen. But then again, I haven't seen much:hammer:
CollinsAuto
March 30th, 2007, 04:06 PM
Not really a surprise there. the l76 intake works fairly well actually just have to keep in mind the application.the ls6 only goes 280 on the bench vs the fast at 300 and I have no problem getting gobs of power out of those ls6 intakes to date the fast intakes haven't been working that good for me. May try porting one and working the runner to see if i can get it to work ???. Sometimes raw flow doesn't tell the whole story but it helps get a very good idea of where things are going.
SStrokerAce
March 31st, 2007, 03:28 PM
It's odd but the bench numbers I have seen of car intakes vs. truck intakes on LS heads is opposite to what Richard has seen. Don't know why that is.

Bret
CollinsAuto
March 31st, 2007, 06:29 PM
whats your data say ?

It's odd but the bench numbers I have seen of car intakes vs. truck intakes on LS heads is opposite to what Richard has seen. Don't know why that is.

Bret
SStrokerAce
March 31st, 2007, 08:03 PM
The truck intake can flow more if you match the head and the intake.
CollinsAuto
March 31st, 2007, 08:14 PM
Hows the runner length compare to say a ls6 ls1 ?

The truck intake can flow more if you match the head and the intake.
SStrokerAce
April 1st, 2007, 04:35 AM
Around the same, the port taper and shape is just different.

As for the truck manifolds being off compared to the car manifolds not the case from this data.... This is all cathedral port stuff with the 90mm truck intake.

Lift - Base - Truck - LS6

.300 - 194 - 188 - 185
.400 - 256 - 232 - 227
.500 - 298 - 261 - 253
.550 - 307 - 270 - 261
.600 - 313 - 277 - 265

Bret
CollinsAuto
April 1st, 2007, 03:12 PM
Thas actually better then I thought it would be. So the truck intake looks like the ticket huh ?

Around the same, the port taper and shape is just different.

As for the truck manifolds being off compared to the car manifolds not the case from this data.... This is all cathedral port stuff with the 90mm truck intake.

Lift - Base - Truck - LS6

.300 - 194 - 188 - 185
.400 - 256 - 232 - 227
.500 - 298 - 261 - 253
.550 - 307 - 270 - 261
.600 - 313 - 277 - 265

Bret
SStrokerAce
April 1st, 2007, 09:51 PM
Depends on your heads I would think, there is oppossing data on this, like you and the FAST. I know applications which it works VERY well for and some guys do better with a car intake.

Bret
CollinsAuto
April 2nd, 2007, 01:29 AM
I'd bet that those intakes are just as cam sensitive as the ls6 and the Fast can be.

Yeah there are no hard fast guarentess in this bussiness huh.

Sean

Depends on your heads I would think, there is oppossing data on this, like you and the FAST. I know applications which it works VERY well for and some guys do better with a car intake.

Bret