Inital Results: 7.4 HP gain over an LS6 Intake on a 427 CID F-Body.

This was the 78MM version with ported stock TB, bolted on with no changes to tuning or anything else on the vehicle.

We'll continue the fine tuning this afternoon and post more results as we generate then.

- Wayne, David and Jayson at Motorsport Technologies

 

How much less would that be on a 346 LS1? Those results seem pretty disappointing to me for the cost.

 

interesting....

 

Weird, we have one thread where it picked up 13 RWHP on a stock heads/mild cam car and another where it only picked up 7 RWHP on a big CI engine.

 

Isn't the 90mm intake recomended for bigger than 346ci?

 

We chose to test the 78mm version first as we're waiting on the 90mm TB to be released.

Thanks.

 

I'm betting the throttle body size is the main restriction on the big 427ci engine. Also, this 427ci engine has a relatively small 236/236 cam in it.

Tony

 

Any plans to do a stock cube car today or tomorrow?

 

 

 

Jayson tells me they'll be trying out some larger TBs (I volunteered a BBK I have laying around there somewhere) to wring some more HP out of this intake.

 

was the dyno testing done on the same day like it was done at Thunder?

 

Yea hopefully with the bigger TB it will make bette numbers or else its gona be some pissed of people that pre-ordered the intakes.

 

I'll cancel my order if that's all it provides on a 427 after all the bugs/TBs are utilized, etc.

 

can the 78mm intake be hogged out to use a BBk 80 mm TB without the reducer?

 

7.4 hp is very disapointing. Especially on that motor. I would have expected that from a stock motor and the more power the more hp is gained. Maybe this will drive down prices!

 

I agree with tony. big motors take alot of air and I'm betting that the TB is a large restriction at that point. For small CID cars with ported heads you see a massive flow drop in the intake ports once you bolt on a LS6 intake. if some of this flow is restored with the LSX intake, power gains can be exceptional (if the TB doesn't pose a restriction yet)

 

we will be testing stock cars and H/C cars tommorow and Friday.

thanks

 

It may only be 7.4, but it was also said that there were no changes to tuning. I wonder what that would change to with the 90mm TB and having it tuned for that intake?

 

I think to be truly fair to FAST, on a motor like this is to use the 90mm TB version AND port match the intake to the intake port of the head, I am sure they need it!!! then get some numbers for us!