Why are more people not running the GMPP intake? The intake and a 2000cfm 4-barrel TB can be had for less $$$ than a LSx 90mm intake and TB, an can potentially flow MUCH more air, why are there no (as far as I can remember) N/A or NOS cars running this intake/tb combo? I know the FI guys are having good results with it, any N/A or NOS setups? Good or bad?

Thanks, Shawn

 

I think the reason is because it requires you to cut your stock hood to clear the 4-barrel TB. Plus I think I read where you had to do some work re-routing the throttle linkage.

 

Why are more people not running the GMPP intake? The intake and a 2000cfm 4-barrel TB can be had for less $$$ than a LSx 90mm intake and TB, an can potentially flow MUCH more air, why are there no (as far as I can remember) N/A or NOS cars running this intake/tb combo? I know the FI guys are having good results with it, any N/A or NOS setups? Good or bad?

Thanks, Shawn

 

I'm curious too, include the Edelbrock aswell...

 

I'm guessing its that whole "gotta cut the cowl" thing...

 

Clearance -- thats the problem. In order to get one on the car you have to have a crazy elbow made. Also, having said elbow will kill your airflow.

 

How do they flow? Aside from cutting the cowl, wouldn't it flow MUCH better? Also, I am talking about a 4bbl tb, not an elbow.

Shawn

 

Haha sorry I wasn't even paying attention to the thread, but caught up in SPANKYLS1's avatar/signature....how true...and hilarious

 

Yeah, I thought so, too.

I can't believe there isn't more info about these intakes....

 

I have just purchased one.

Is clearance the only reason for the front mounted throttle body set up ?

Anyone got any before and after dyno numbers ?

cheers
Mal

 

my car looks really nice the way it is. i don't feel the need to cut the crap out of it at the moment. i'm betting there's some ppl that agree with me, and thats why the intake isn't more popular. plus.....EFI is more efficient for DD's.

 

Because it would be going backwards.

 

GMPP with a 4 barrel accufab 4500 serious 2110 CFM TB going on the car soon. I'll let everyone know how it turns out. Cut the cowl, put a cowl hood on, and re route the throttle linkage is all correct. Should be interesting.

 

DAPSUPRSLO- What is your engine combo? How many cubic inches, N/A, NOS, FI?

BBQLS1- a 2000 cfm TB is still fuel injection, not at all going "backwards". (?)

cyphur-traq- Function before form. Again a 2000 cfm TB is still fuel injection.

Shawn

 

SPANKY LS1 I am printing that sticker out and its going on my beater's window TONITE LOL

 

For right now it will be going on my 346 with a nasty h/c setup. It is way overkill for this motor but will work fine for right now. It is truly meant for my 8000rpm 408 that I will be running in the future. Remember, one must notice that these things are rated at 28" of water vacuum. A manifold like the GMPP will allow much less vacuum to be seen by the throttle body at wot throttle. Therefore my 2100CFM throttle body will only flow according to the vacuum it is exposed to. Plus, this is not like a carb, you can't over throttle body a motor, to an extent anyway. I can't wait to see what it does.

 

We will be running the GMPP intake, Wilson 100 degree elbow and an Accufab 90mm TB. I am going to have the intake milled down about .25" as well as the elbow and it will fit under the stock hood and cowl without cutting. As shipped, all the parts fit underneath but require minor trimming on the cowl area (bye-bye wiper cover). We are going to fully dyno tune it sometime this week (vs. LS6/stock TB). We are hoping to have it running by next Wednesday for Super Chevy Show (in Pomona) and run deep into the 10s.

 

i had mis-read the post, my bad. between reading the thread and posting i equated it to carb tech.

and yes, function before form, i agree.....to a point. if this was purely a race car for me, then i wouldn't much care how it looked as long as it flew down the track. but this is my dd, and i care very much how it looks. i'm asthetic with my cars, oh well. hence my refusal to hack it up. to each their own.

 

Has anyone flowed the intake and compared it to the standard LS1 intake(with similar sized runners)? I'm not too sure of the design. I think more of a tunnel ram style with two throttle bodies would be better. I thought the intake was for running a carb, but since we are talking FI, i'd like to know about the advantages, if any by using this intake.


Edit: Ment to say tunnel ram with a plenum on top. Not two throttle bodies.

 

I read a post that (at 28") a ported GMPP intake flowed 380cfm to each runner. I'd say its worth it. Kurt at W2W just put 1700hp though one with 352cid.

Anywho...no one converts because they are scared to cut an inch of cowl and run speed density.


Here's a pic of a massacred cowl with a single plane intake:

https://ls1tech.com/forums/attachmen...chmentid=30423

Its an FI setup...but an 4-hole is not that much taller...especially if you trim a little and do not run a spacer or plate N2O setup. The space issue is an air filter issue.