MP122 - What Compression?
Aug 5, 2008 | 06:12 PM
#41
Aug 5, 2008 | 08:13 PM
#42
TECH Veteran
Joined: Sep 2003
Posts: 4,534
Likes: 3
From: Las Vegas, NV
Thanks for the info. I agree that with the 3.0" pulley he is now spinning it up into the heat range. How was his numbers with the 3.2"? Not picking, just curious.
Aug 5, 2008 | 08:42 PM
#44
TECH Veteran
Joined: Sep 2003
Posts: 4,534
Likes: 3
From: Las Vegas, NV
Thanks for posting that info. The L33 (I can't say enough about that engine) and the MP112 are a great combo. The Radix style blowers seem to work best with compression of around 10:1 (L33 is 9.9:1). This also answering the question at hand and post topic. If you look at the best responding Radix trucks they are often the LQ9 due to compression and cubic inch. Some say run as much boost as you can with your compression, I say run as much compression as you can with your boost. 
Aug 5, 2008 | 09:53 PM
#45
Why do you think I'm all Turbo? 95% of the FI vehicles I do is Supercharged with even a small amount of Maggie's.(Yes,I do recommend them to certain goal's customers want).We built a 4.8 Maggie truck probly 5-6 years ago than ran 11.7's or .9's(I forget)So I'm pretty flexable.
We keep high regards to inlet temp/timing on vehicles and fully know the affects of them. I really want to know why the west coast has low temps and the east coast are high. 15psi over here is easy 200degree inlet temps from the Maggie location sensor which is a simple heat transfer from the compressed air.Then that is verified by the timing by getting KR and spark knock.
Yes, a Turbo or centrifical blower would put out the same high temp but they run A/A intercoolers which cut a ton of heat out.Then we run Meth just like the Maggies and see inlet temps drop dramaticly.2 days ago we dyno'd a 402ci with F1-c procharger (16lbs)on 93 and meth. Inlet temp started at 120 degree's and the end of the run was 65 degree's.
.
Maybe we are all overlooking a simple problem? Maybe the best thing is to send the blower back to be looked at?
We keep high regards to inlet temp/timing on vehicles and fully know the affects of them. I really want to know why the west coast has low temps and the east coast are high. 15psi over here is easy 200degree inlet temps from the Maggie location sensor which is a simple heat transfer from the compressed air.Then that is verified by the timing by getting KR and spark knock.
Yes, a Turbo or centrifical blower would put out the same high temp but they run A/A intercoolers which cut a ton of heat out.Then we run Meth just like the Maggies and see inlet temps drop dramaticly.2 days ago we dyno'd a 402ci with F1-c procharger (16lbs)on 93 and meth. Inlet temp started at 120 degree's and the end of the run was 65 degree's.
.
Maybe we are all overlooking a simple problem? Maybe the best thing is to send the blower back to be looked at?
there has to be something missing. iat's in the 240's is huge and detrimental to making good power regaurdless of what FI is being used.
Aug 6, 2008 | 09:34 AM
#46
Aug 6, 2008 | 09:35 AM
#47
R
Thread
Thread Starter
Forum
Replies
Last Post
zblee
GM Engine & Exhaust Performance
3
Nov 11, 2015 12:41 AM
