150 shoot on a lt1??????
Thread Starter
Staging Lane
Joined: May 2006
Posts: 93
Likes: 0
From: ALWAYS ON THE RUN
150 shoot on a lt1?????? i was wondering if this is the most i can do?
ALL I HAVE IS HEADERS,MALLORY 685,MSD COIL/WIRES AND M/T D/R
what would i have to do if i decide to do a 200??????????
EVERYTHING ELSE IS STOCK
ALL I HAVE IS HEADERS,MALLORY 685,MSD COIL/WIRES AND M/T D/R
what would i have to do if i decide to do a 200??????????
EVERYTHING ELSE IS STOCK
Last edited by speedylexus2006; Jul 24, 2007 at 12:01 PM.
Originally Posted by speedylexus2006
i was wondering if this is the most i can do?
ALL I HAVE IS HEADERS,MALLORY 685,MSD COIL/WIRES AND M/T D/R
what would i have to do if i decide to do a 200??????????
EVERYTHING ELSE IS STOCK
ALL I HAVE IS HEADERS,MALLORY 685,MSD COIL/WIRES AND M/T D/R
what would i have to do if i decide to do a 200??????????
EVERYTHING ELSE IS STOCK
150 is pushing the stock fuel pump. I have seen a guy spray 225 thru his but he ended up melting a piston because of a fuel problem(stock pump). I sprayed mine with 200hp at the wheels.About a month ago but then the rear end let go. So I may be going back to the track Friday.
I would get a Walbro gss307 or gss340 fuel pump. 255lph.
Just remember to pull 2 degrees timing per 50hp with your mallory 685. It wouldn't hurt to pull a little extra for the 200 shot and check the plugs.
On The Tree
Joined: Aug 2005
Posts: 155
Likes: 0
From: pharr, texas USA
Originally Posted by teezlr
I have a stock 93' lt1 Formula, I have the 75 hp jets in right now and have yet to spray it. Can I run 100 hp jets without changing timing or plug gap?
-good luck
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Just wondering if anyone has tried a bigger shot than 150hp? I have the fuel upgrades for it. Most of the nitrous safety equipment thinking of running a 175shot then try a 200hp shot just to see if it will handle it.
Derek
Derek
Originally Posted by derekderek
Just wondering if anyone has tried a bigger shot than 150hp? I have the fuel upgrades for it. Most of the nitrous safety equipment thinking of running a 175shot then try a 200hp shot just to see if it will handle it.
Derek
Derek
Regardless, that kind of a hit on a tired factory shortblock of an LT1 -- don't expect it to last forever.
Originally Posted by WhyHelloOfficer
Assuming you've got the correct a/f with proper jetting and timing retard, I don't see why you won't be able to spray more than 150. There have been people spraying 175-200 on the factory shortblock but most don't venture that far.
Regardless, that kind of a hit on a tired factory shortblock of an LT1 -- don't expect it to last forever.
Regardless, that kind of a hit on a tired factory shortblock of an LT1 -- don't expect it to last forever.
Yea I would'nt expect it to last to long with that size of shot. But I figured the rear end will go before the engine would. I am going to Iraq soon so I just want to see what she can handle / Get my thrill's out of her before I leave. But I think with the higher octane and Meth. proper timing it should be ok for a run just got to watch my fuel pressure and what not. I have autolite 103's thinking of going another step colder just for insurance. Any other suggestions?
Originally Posted by derekderek
Yea I would'nt expect it to last to long with that size of shot. But I figured the rear end will go before the engine would. I am going to Iraq soon so I just want to see what she can handle / Get my thrill's out of her before I leave. But I think with the higher octane and Meth. proper timing it should be ok for a run just got to watch my fuel pressure and what not. I have autolite 103's thinking of going another step colder just for insurance. Any other suggestions?
If you plan on running some decent tire, then I'd be concerned for the transmission and rear end. I typically hit the kit after the 60' to try to minimize the stress on the drivetrain.
I usually run a 1/2 & 1/2 100/93 Mix when I spray at the track to be safe, along with three degrees pulled for the 100 shot. If you're going for broke, then who cares. Just sit down, shut up, and hold on. My setup is very conservative because I need my shortblock to survive another four semesters of college
God speed to you in Iraq. Everything you and our armed forces do is greatly appreciated
JakesZ28, you previously said you had been spraying a 150 shot on stock timing but now you're advising to pull 2 degrees for every 50hp?
I'm going to spray a 125 shot (flywheel) and needed to know if I should be pulling timing from my stock setup or not.
I'm going to spray a 125 shot (flywheel) and needed to know if I should be pulling timing from my stock setup or not.
Guest
Posts: n/a
I would never suggest spraying more than 150 on a stock motor...can you yes but I would not. This is for many different reasons.
1) Flow characteristics of the stock manifold starts to have distribution issues above 150
2) The stock pistons are not going to enjoy the cylinder pressure, and any slight issue is going to have major consequences.
3) the factory fuel system was not designed to support that much power.
To run up to 200 shot on a stock LT1, would require upgrading the fuel pump, monitoring AF, and checking the plugs to verify distribution.
The 1-2* per 50hp rule for timing is just a base starting point. For a 200 shot I would pull 8-10* and monitor knock and the plugs while slowly adding timing back in. Most nitrous kits are jetted for stock timing and fuel pressure. Any changes you make to the vehicle might require adjustments to the jetting to maintain a safe AF.
Last but not least you must be willing to pick up the pieces when it breaks.
1) Flow characteristics of the stock manifold starts to have distribution issues above 150
2) The stock pistons are not going to enjoy the cylinder pressure, and any slight issue is going to have major consequences.
3) the factory fuel system was not designed to support that much power.
To run up to 200 shot on a stock LT1, would require upgrading the fuel pump, monitoring AF, and checking the plugs to verify distribution.
The 1-2* per 50hp rule for timing is just a base starting point. For a 200 shot I would pull 8-10* and monitor knock and the plugs while slowly adding timing back in. Most nitrous kits are jetted for stock timing and fuel pressure. Any changes you make to the vehicle might require adjustments to the jetting to maintain a safe AF.
Last but not least you must be willing to pick up the pieces when it breaks.
Originally Posted by 1997compT/A
JakesZ28, you previously said you had been spraying a 150 shot on stock timing but now you're advising to pull 2 degrees for every 50hp?
I'm going to spray a 125 shot (flywheel) and needed to know if I should be pulling timing from my stock setup or not.
I'm going to spray a 125 shot (flywheel) and needed to know if I should be pulling timing from my stock setup or not.
On my car I sprayed about 60 to 70 passes on a 150 shot with stock timing and no noticable problems. But when I hooked up the mallery 685 I pulled some timing and actually picked up a little MPH. So I must have had some knock and the computer pulled extra timing to get rid of it.
I have currently stopped the computer from pulling timing at WOT. So I pull 4* for a 150 shot and my timing is advanced some in the tune.
