N20 C6 vette vs. Turbo Mach1
01-21-2010 | 02:12 PM
#23
TECH Apprentice
Joined: Aug 2006
Posts: 335
Likes: 0
From: CA
Actually..All cars are differant but we have some general rules that for the most part are true across the board "on average"
-general rule #1...100 pounds less weight is 1 tenth faster in the 1/4 mile
-general rule #2...10 rwhp gained on the dyno is 1 tenth faster in the 1/4 mile
-general rule #3 appendix B...14.7 psi or "1 bar" will double your rwhp before boost was applied...
Good example is a stock 300 rwhp camaro......If you could get the engine to safely hold 14.7 psi or "1 bar" the camaro would be a 600 rwhp beaste...
Unfortunetly the engine will most likely detonate and blow at 14.7 psi so most go with a 7 pound pully or (.5 bar) that will now have this camaro dyno 450 rwhp....
This is why you see a lil baby 150 rwhp engined civic add 14 psi of boost and still only dyno 300 rwhp.....Or a 400 rwhp 1996 Viper add only 7 pounds of boost and dyno 600 rwhp...
General rule 3 appendix B stays pretty consistant across the board
-general rule #1...100 pounds less weight is 1 tenth faster in the 1/4 mile
-general rule #2...10 rwhp gained on the dyno is 1 tenth faster in the 1/4 mile
-general rule #3 appendix B...14.7 psi or "1 bar" will double your rwhp before boost was applied...
Good example is a stock 300 rwhp camaro......If you could get the engine to safely hold 14.7 psi or "1 bar" the camaro would be a 600 rwhp beaste...
Unfortunetly the engine will most likely detonate and blow at 14.7 psi so most go with a 7 pound pully or (.5 bar) that will now have this camaro dyno 450 rwhp....
This is why you see a lil baby 150 rwhp engined civic add 14 psi of boost and still only dyno 300 rwhp.....Or a 400 rwhp 1996 Viper add only 7 pounds of boost and dyno 600 rwhp...
General rule 3 appendix B stays pretty consistant across the board
Um...ok. I would add,but a couple of other members have already stated what's needed.That's flat out wrong. It might apply to stock cars (doubt it), but it gets significantly more difficult to gain ET as a car becomes quicker. For example, a car that runs 6.50 in the 1/4 will absolutely not pick up 1 tenth for each 10rwhp gained! In that scenario, it already takes roughly 2,500hp to run a 6.50...assuming a 2,800lb car or so. 10rwhp will literally do nothing in that application.
What do you mean by detonate? Are you talking about spark knock or are you talking detonation as in explode like a bomb? It has much less to do with detonation and more to do with the weak internals of the LS1 (i.e rod bolts). Pour enough octane in the tank and you're not going to see detonation.
...and we're talking turbos here. What's this "7 pound pulley" you're talking about?
...and we're talking turbos here. What's this "7 pound pulley" you're talking about?
and btw - my point doesn't just apply to Turbo's. 8psi on a p1sc head unit will yield less power than on a D1sc generally. That's also not to consider difference in mods and assumes same mods on same car. Then there's the CR factor of the motor. THe higher the CR the less boost is required to hit a 'target' rwhp. Take a stock mach with 10:1 and through a stock port/pullied eaton on it and you'll get more power out of it over a cobra which is 8.5:1. Same applies to PD blowers. BOth TS and eatons will produced varied HP with the same psi pending displacement/port stage. Again, that 'rule of thumb' is just plain wrong.
01-21-2010 | 03:24 PM
#25
Teching In
Joined: May 2005
Posts: 15
Likes: 0
From: Delaware
And what do you do while you're waiting for it to spool up, have a snack? LOL! Seriously though Dan, nice numbers, for a used Sunbeam hair dryer!!
01-25-2010 | 03:33 PM
#26
lol I don't really wait for it to spool because when I start out race i'm not starting the race at idle or 3k rpms. On the street I can brake boost the car and be at full boost before I even let off the brake to take off. lol
That turbo mach1 makes some killer power!
01-25-2010 | 04:41 PM
#29
Actually..All cars are differant but we have some general rules that for the most part are true across the board "on average"
-general rule #1...100 pounds less weight is 1 tenth faster in the 1/4 mile
-general rule #2...10 rwhp gained on the dyno is 1 tenth faster in the 1/4 mile
-general rule #3 appendix B...14.7 psi or "1 bar" will double your rwhp before boost was applied...
Good example is a stock 300 rwhp camaro......If you could get the engine to safely hold 14.7 psi or "1 bar" the camaro would be a 600 rwhp beaste...
Unfortunetly the engine will most likely detonate and blow at 14.7 psi so most go with a 7 pound pully or (.5 bar) that will now have this camaro dyno 450 rwhp....
This is why you see a lil baby 150 rwhp engined civic add 14 psi of boost and still only dyno 300 rwhp.....Or a 400 rwhp 1996 Viper add only 7 pounds of boost and dyno 600 rwhp...
General rule 3 appendix B stays pretty consistant across the board
-general rule #1...100 pounds less weight is 1 tenth faster in the 1/4 mile
-general rule #2...10 rwhp gained on the dyno is 1 tenth faster in the 1/4 mile
-general rule #3 appendix B...14.7 psi or "1 bar" will double your rwhp before boost was applied...
Good example is a stock 300 rwhp camaro......If you could get the engine to safely hold 14.7 psi or "1 bar" the camaro would be a 600 rwhp beaste...
Unfortunetly the engine will most likely detonate and blow at 14.7 psi so most go with a 7 pound pully or (.5 bar) that will now have this camaro dyno 450 rwhp....
This is why you see a lil baby 150 rwhp engined civic add 14 psi of boost and still only dyno 300 rwhp.....Or a 400 rwhp 1996 Viper add only 7 pounds of boost and dyno 600 rwhp...
General rule 3 appendix B stays pretty consistant across the board
01-26-2010 | 06:29 AM
#31
TECH Regular
Joined: Jul 2009
Posts: 426
Likes: 0
From: MOV
