Am waiting on my new heads and cam package from Lloyd Elliot, with my new combo i plan on making around 400 rwhp, and possibly a shot of nitrous later. Lloyd told me i would need 30#ers, but some charts i have seen say i need up to #36? I definetly dont wanna go too small but i know too large is bad also.

Im also going to need a larget TB, Lloyd recommended a 52mm. Would my best bet be buying a 52 or 58mm one or having my stock one ported to 52mm?

thanks guys appreciate any input!

 

Actually, "too large" isn't bad at all. Just keeps your injector duty cycle down, and puts more of the pulse width into the intake stroke. Obviously, you don't want to go nuts, but 36# injectors on a 400rwHP setup is not "too large". Leaves you a little room for further power gains.

Excessively large injectors might make it difficult for the PCM/injector combo to meet the sub 1.0mSec pulse widths required to allow the engine to idle smoothly. But that's not an issue with 36# injectors.

The impact of adding nitrous depends on whether you use a wet system (doesn't affect injector sizing) or a dry system (depends how you add the extra fuel - higher pressure when spraying, or extra pulse width with an aftermarket ECU).

 

If i do a nitrous shot i will probebly end up doing a wet shot, since ive heard it is a little safer than the dry?

Thanks Injuneer, #36ers sound like just the ticket

 

For a 52mm I would only do a rebored stocker, save a few bucks and avoid some of the hassles guys have had with aftermarket stuff, David Koldos does awesome work the Vette guys rave about. If you plan to buy an aftermarket I would just skip right to the 58mm, why spend all than money and not get the bigger of the two and 58mm is not too big, really with port fuel injection you should not be able to go to big on a TB.

 

Depends how you define "safer".... dry nitrous can run the risk of injector failure or lockup causing engine damage. Wet nitrous puts a highly explosive mixture of nitrous and fuel into a manifold that was designed only for air flow, and can cause large backfires in the manifold. Its a toss-up. I prefer dry, but I have a nitrous-friendly aftermarket ECU that allows me to carefully control the nitrous and NA engine operation. I'm running 64# Bosch injectors at 58psi, giving me a 70% duty cycle at 800flywheelHP.

 

How can i get intouch with this guy? How much does he charge?

Im not a big fan of the aftermarket TBs, everyone seems to have trouble with them, and it seems questionable if they are really needed or not.

 

http://impalassforum.com/noncgi/ulti...=000024#000018

Here is a thread with his info and testimonials, heck maybe he will even honor the GP price.

 

Wow...$200 for a stock ported TB?

Im paying $125 to have my intake ported lol, seems like that would be alot more work.

Isnt a new 52mm TB like $250?

 

I had a 52 holley at first POS never could get it to run right at WOT Then had someone do the stocker to 52 (not David) and it is friggin awsome. Besides if you have emissions or talking smack for a street race with your hood up it is a good stelth mod. Mine was in the $200 range as well shipped and all

 

TB go with a 58mm. On the injectors, I'm making well over 400rwhp with 30# SVO injectors.
Steve...

 

I would use 30lb SVO injectors. They are rated at a lower pressure than ours so in an LT1 they would flow like 33.something lbs. The only way I would go th 36 lbs was if I was using a dry nitros setup.

If that is your final set up and you don't plan on going much bigger on the cam later, I would stick to a 52mm stock reworked throttle body. A 52mm throttle body will flow 750 CFM and you will never need any more air than than with your set-up. I know some one on this board running a bit over 400RWHP with 30lb SVO injectors and a STOCK 48mm throttle body. He's running 11.70s last I saw.

 

If i can get a good price on #36 injectors would they still work alright like Injuneer said?

 

If any of you are interested I port stock 48mm to 52mm on my Bridgeport CNC milling machine. I only charge $155, and I'll give you $30 back if you send me your stocker for a core. I've been running one now for almost 3 years and have had no problems what so ever. I've done them for friends LT1s and TPIs. I machine the new butterflys out of .0625 2024-T3 aluminum. The throttle body also has roller bearings installed at each end of the shaft, which makes for an awesome unit, and allows for precision fittment and repeatability of the new blades without any binding. Here are some links of some I've done in the past.

http://memimage.cardomain.com/member...512_1_full.jpg

http://memimage.cardomain.com/member...12_36_full.jpg

http://memimage.cardomain.com/member...12_51_full.jpg

http://memimage.cardomain.com/member...12_37_full.jpg

Email me if interested.

 

What head package did you decide to go with?

LE1 or LE2?

I am in a debate myself of which to go with. I have tried emailing lloyd a couple of times but havent recieved a response. I wonder if my email isnt working correctly or something.

I am debating on LE1 with Hotcam or LE2 heads and cam from llyod. I am wanting the cam cut specs though so I can make a good decision. Hopefully when I can get ahold of him he can figure out whats best for my setup.

Good Luck!

 

I went with the LE1 package, and a different cam that he offers.