LS1 Lid conversion on LT1 with stock hood....


You have to lay the radiator back almost until the upper radiator hose touches the ABS mounting plate (1/4 inch gap). Pull the condenser out of it's holding tabs and drop down. Tap down the top of the condenser. Bend the upper condenser hose to fit. Trim the radiator top. Trim the upper radiator support to fit your particular size air filter. Make some new holding straps/and or make a new cover. Cut the cross brace in the hood, just above where the Air intake will sit.

Lots of work for a stock type car...Hopefully I can get to the dyno this week and see what if any real gains on my 401 combo..I can already tell you, it does pull harder in the upper rpm ranges vs. my old Moroso CAI (could be due to better cold air affect though), and that the IAT's stay down to outside temp if you stay moving over 20mph.

 

Fantastic pics and detail thanks. This should be posted as a sticky. Can you close your hood and is the hood stock?

 

sweet, thanks for the pics. what kind of intake manifold you running?

 

Here's a video of my car "when it gets done optimizing" That shows the hood down...
http://video.ls1tech.com/video/c4956...710011aa9a.htm

I'll get those under hood pictures loaded maybe, tonight...

luckyou03
That's a custom "Speed Secrets" intake manifold. Ellis "twofast4lv" put it together. Welded behind runners, ported runners, ported threw the whole manifold. Top was cut and raised 2 inches. NO cross over tube hump in manifold

 

what is the black cover made of? i cant tell what you used to seal the lid?

 

That's definetly really sweet. Doesn't seem like it would be worth it though for a close to stock car though. You're 401 should like it a lot though.

 

You would be suprised, I've seen 25rwhp over the standard CAI with that setup on stock motors.

Bret

 

went from 12.20 to 12.05 spinning with just this change...same track...now add in a ram air from the for lights, ls1 guys say 1-3 tenth gain and 1-3 mph...im hoping for a mid to low 11.8

 

Can't you use the radiator from the correct year to hot have to cut it up? All under a stock hood too

Your intake is NUTS! And that TB, who makes that? Is that just a Holley? Looks bigger heh. FULL OF questions

 

Ls1 radiator is basically a thin core version of ours. So, yeah you would still need to cut the top...That's easy though. You can see, I cut a little too much on the far side (engine side) of the radiator, I could have left more. It's more than strong enough though....

The TB is an LPE/Accell. Back in the day (I'v had my stroker sense 1997) that's the only thing you could get. It's actually got a 3rd gen TPS plug that came with a kit from LPE, to convert our smaller "LT1 Plug" to that bigger 3rd gen plug.

Bret,
I hope to see some power out of it. I know Ellis could not get any traction with it after the 2/3 shift. He had to lift twice and had spinning problems off the line, like a 1.7 something 60 foot. The first day out this season it ran a 1.52. I'm sure it will 60 in the 1.4's next year with some time on it. Not bad for 3700+lbs....

 

Thin tin. Ryan K (Fueling@Injection moderator) made a template out of card board. We laid it over the tin and just cut it out. The back lip area was bent with a 2X4 block of wood. Then we just painted black... I'm lucky to have Ellis (Speed Secrets), Ryan and Cory H (LS2 port works) in the same general area (it also helps were all on the same race team ).

 

Looks good. I'll have to play with mine I guess..

 

We are real interested in the results. JimBob worked hard to get it all done. If it works as well as reported we will be converting the other shop car also

JimBob did an outstanding job. He worked on it for days to make sure it was just right.

Good Job Jim!

 

beautiful! I think I just posted on another thread asking for more pictures of your work - sorry. hehe.. Didn't see this thread till now. Its looks really good. I'll definitely be using yours as a reference for a rainy day project.

 

Over a stock setup or a K&N CAI aftermarket, was this on a LT1 car?

David

 

what did you use for the tubing going from the TB-MAF?? is that a "smooth bellow" for an ls1? thanks

 

That's just a straight 4 inch silicone hose that fits over the airlid then to my 85mm MAF. The other end of my MAF is a 4 inch to 4 inch hump hose. Fits real good and tight.

 

Yes CAI... and LT1 car.

 

any ideas on how this would compare to the stock lt1 ram air?

 

Nice Pics, Good work!