Need more boost! Take advantage of your built motor and fuel system.
Don't be afraid to over spin the little SI a bit. Remember your not at WOT for long periods of time.
Numbers seem low....
Thread Starter
Pro
Joined: Nov 2007
Posts: 735
Likes: 1
From: Round Rock TX
Numbers seem low....
Car is at Dallas Performance for fuel system and tuning.
Heres the low down- 402- AFR 225s, 224-228 114+1 camshaft 581-588 lift.
60# injectors, DP fuel system, meth
v3si- on the 3.8 pulley
Car made 600 rwhp conservative(which I want) not really using the meth.
Numbers seem way low to me but could it be im not running enough boost to fill the bigger cubes? A&A recommended the 3.4 pulley for a bigger cube engine but i wanted to stay conservative i just didnt think it would be this conservative. Dont have the graph just yet Taylor is still messing with it so I dont know how much boost its actually making or what AFR its at, timing etc....
your input???
Heres the low down- 402- AFR 225s, 224-228 114+1 camshaft 581-588 lift.
60# injectors, DP fuel system, meth
v3si- on the 3.8 pulley
Car made 600 rwhp conservative(which I want) not really using the meth.
Numbers seem way low to me but could it be im not running enough boost to fill the bigger cubes? A&A recommended the 3.4 pulley for a bigger cube engine but i wanted to stay conservative i just didnt think it would be this conservative. Dont have the graph just yet Taylor is still messing with it so I dont know how much boost its actually making or what AFR its at, timing etc....
your input???
Burning Brakes
Joined: Mar 2011
Posts: 783
Likes: 2
From: Houston Tx
HMMMMM, a built 400inch motor, heads, cam, meth, DP fuel system, blower, yeah, I"d say the numbers are low. Hate to be blunt, but man, that's alot of money for those results. I would be one pissed off customer.
What does conservative mean? Why conservative on a built motor? That is the whole reason for building a motor, so you can get aggressive with it. To me conservative means that it is an underachiever and they use the word conservative to cover the lower numbers. Look at the money spent, and the power gained, you decide if it is right or not.
What does conservative mean? Why conservative on a built motor? That is the whole reason for building a motor, so you can get aggressive with it. To me conservative means that it is an underachiever and they use the word conservative to cover the lower numbers. Look at the money spent, and the power gained, you decide if it is right or not.
Last edited by p1bz; Oct 28, 2011 at 10:41 PM.
Le Mans Master
Joined: Feb 2007
Posts: 6,674
Likes: 57
From: Mt Pleasant, TN
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
It's much better to have a conservative tune and more boost than less boost and an aggressive tune. "not really using meth" is an issue as well. If you have a meth reliant tune, you can get more aggressive with the tuning and still be considered "conservative". I personally don't care for your methanol system though, so I wouldn't feel as safe running it as a meth-reliant tune. Tuning any car properly on pump fuel and then adding meth to it will lower your power. If the car is mechanically sound, the only thing there is to tune at WOT is fuel and spark timing. Taylor is as good at tuning Corvettes as anyone I know, so I know he's made sure the tune has the desired spark and fuel at WOT. When tuning any car, you give it what it needs and it makes what it makes.
Bottom line.....add boost if you want more power.
Bottom line.....add boost if you want more power.
Melting Slicks
Joined: May 2004
Posts: 2,118
Likes: 12
From: 918 OK
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Thread Starter
Pro
Joined: Nov 2007
Posts: 735
Likes: 1
From: Round Rock TX
It's much better to have a conservative tune and more boost than less boost and an aggressive tune. "not really using meth" is an issue as well. If you have a meth reliant tune, you can get more aggressive with the tuning and still be considered "conservative". I personally don't care for your methanol system though, so I wouldn't feel as safe running it as a meth-reliant tune. Tuning any car properly on pump fuel and then adding meth to it will lower your power. If the car is mechanically sound, the only thing there is to tune at WOT is fuel and spark timing. Taylor is as good at tuning Corvettes as anyone I know, so I know he's made sure the tune has the desired spark and fuel at WOT. When tuning any car, you give it what it needs and it makes what it makes.
jobberone
Joined: Aug 2003
Posts: 2,062
Likes: 8
From: Kailua Kona HI
You're at a pretty good number for street driving but you're not using a lot of that motor. Put the smaller pulley on and make some numbers. And add the meth to the tune. There is adding meth at the top and there is adding a lot of meth at the top. Stay around 13% or so if you want to stay conservative on the meth. That's not a lot of fuel to pull. And that's a pretty conservative meth tune.
Melting Slicks
Joined: Jul 2007
Posts: 2,087
Likes: 11
From: Austin TX
7# and 600rwhp seem like some pretty efficient numbers. I have heard that Taylors dyno is a little number stingy so if you are chasing down numbers, take it to another dyno and see what it puts down. If you're looking for some more power, just pulley down
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
600rwhp@7lbs is pretty efficient/decent.... But with that being said, with a forged engine and good fuel system, you are leaving a TON of potential on the table and it could still be reliable/safe with another 100hp in it....... That setup should be making 700rwhp on a conservative/safe combo......with 800rwhp potential.
If I had all the money in a forged engine and all the supporting goodies, NO FREAKIN WAY could I leave it at 600rwhp..... Thats just not even worth the expense/effort.
If I had all the money in a forged engine and all the supporting goodies, NO FREAKIN WAY could I leave it at 600rwhp..... Thats just not even worth the expense/effort.
Former Vendor
Joined: Jun 2002
Posts: 2,045
Likes: 3
From: Bridgewater Ma
Problem is your looking at the peak HP number which is totally wrong. The Blower is limited by the airflow it put's out with the 3.8" pulley and fairly small blower size for that motor.
What does your midrange hp/tq look like? I bet it's alot higher than the 346ci.
What does your midrange hp/tq look like? I bet it's alot higher than the 346ci.
Thread Starter
Pro
Joined: Nov 2007
Posts: 735
Likes: 1
From: Round Rock TX
I dunno I havent seen the graph. Fully aware im running to big of a pulley- im going to order a smaller puller and see what it does.
Former Vendor
Joined: Jun 2002
Posts: 2,045
Likes: 3
From: Bridgewater Ma
Look at the graph. It should have alot more power down low which is what the 402ci does. The peak hp is limited by the airflow from the blower.
Melting Slicks
Joined: Feb 2006
Posts: 2,163
Likes: 5
From: Houston
It has kinda already been said, but ADD BOOST. Either way, almost regardless of the engine in there, you are going to top out around 700rwhp or so. That is a tiny blower for a big motor like that.
