Highest dyno numbers through JBA's ?
My numbers on the second pull was at superior and they were 410/396 and no I have not had any other pulls on other dynoes as of yet. I am considering going to A and A corvette in Oxnard and having a tune with ls1 edit or HP tuners as my car runs really rough when cold, but after it warms up it runs a whole lot better without any surging or anything. I would run long tubes and true duals, but I am going the turbo route in a year or two and that would be a waist of money. The car feels very strong and when off the dyno you cannot even feel the power fall off past 5800 I am shifting at 6200 and it feels like there is no power loss it only loses about 5-10 rwhp.
I am about to have car retuned with a real ls1 edit tune up until now I have been running a half *** predator tune what does everyone guess I should pick up? Has anyone else out there ran a custom predator tune and then switched to a full on edit tune and seen any impressive results? I believe the predator tune is only wot right? Shouldn't I see some good gains in the midrange and even top end over a predator tune? Since the predator tune is only wot is my car running rich or lean under wot? Will my gas mileage get any better with a edit tune of idle part throttle and wot? My gas mileage does not seem that great ever since the H/C install and predator tune? I probibly only get 20-22 mpg cruising on the freeway in sixth going 75 mph with engine turning over at only 1600 rpms! I am hoping to pick up power and gas mileage. 
If you're really going to do the turbo, then don't do anything now. Save your money and do the turbo the right way. Probably going to cost a pretty penny. I'll probably do that to my next car. Turbo should pass the sniffer much easier and run smoother than a hot na car.
Originally Posted by Silver02
If you're really going to do the turbo, then don't do anything now. Save your money and do the turbo the right way. Probably going to cost a pretty penny. I'll probably do that to my next car. Turbo should pass the sniffer much easier and run smoother than a hot na car.
im having built a 383 9:1 CR forged motor,with the turbo kit and everything im still under $10k so i know exactly what youre talking about,im looking for 600+rwhp on 93 and over 700rwhp on race gas at about 10-12 psi.Whats a 427 cost to build good anyways?like $12k?
i take that back....MTI's website
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Description Price
MTI 427cid Camaro/Firebird Package - Installed $17,995 +exchange
Package Options Price
LS6 Cylinder Head Castings (Worth an additional 20 HP) $1200.00
High Performance Clutch Upgrade for 6-Speed Cars $750.00
High Performance Transmission Upgrade for Auto Equipped Cars $2495.00
Higher Stall Torque Converter for Automatic Equipped Cars $895.00
Heavy Duty Transmission Cooler Package $150.00
Underdrive Crankshaft Pulley Kit (worth an additional 10 HP) $279.00
FAST LSX Intake with High Flow Throttle-Body $1475.00
"
"
Description Price
MTI 427cid Camaro/Firebird Package - Installed $17,995 +exchange
Package Options Price
LS6 Cylinder Head Castings (Worth an additional 20 HP) $1200.00
High Performance Clutch Upgrade for 6-Speed Cars $750.00
High Performance Transmission Upgrade for Auto Equipped Cars $2495.00
Higher Stall Torque Converter for Automatic Equipped Cars $895.00
Heavy Duty Transmission Cooler Package $150.00
Underdrive Crankshaft Pulley Kit (worth an additional 10 HP) $279.00
FAST LSX Intake with High Flow Throttle-Body $1475.00
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Teching In
Joined: Feb 2005
Posts: 45
Likes: 0
From: Orange County
I'm actually going to Superior Automotive tomorrow for a few Dyno passes. I need a good base line before my cam goes in. I'm kinda curious what numbers my JBA will provide. BTW, did you guys do the flange mod to the passenger side header before installation? I'm sure that's worth a few HP.
Your JBA should be a solid 10-15 rwhp even over 00 and newer manifolds as long as you have all the bolt ons. I made 340 rwhp with JBA and nothing but bolt ons!! Just FYI superior cannot tune worth a ****, but they can measure your power no problem.
On The Tree
Joined: Sep 2004
Posts: 100
Likes: 0
From: San Diego, CA
Wow that's great..
When I dyno'd w/ lid, exhaust, and jbas I only did 323whp..
Just recently at a dyno day here a '02 SS with FIPK, Shorties, and exhaust put down the same power as a '02 WS6 with lid and exhaust..
wonder if I should get one of those random tech y-pipes?
When I dyno'd w/ lid, exhaust, and jbas I only did 323whp..
Just recently at a dyno day here a '02 SS with FIPK, Shorties, and exhaust put down the same power as a '02 WS6 with lid and exhaust..
wonder if I should get one of those random tech y-pipes?
I'm glad you're taking this route to mod your car 1LE 99, because this is right where I'm headed. I have/will have a similar setup as yours. you're one step ahead of me, so it's nice to see what your mods are doing for you. Those are nice #'s with the jba's. I just put on an LS6 intake and have the comp 216/220 sitting in my closet. I still have to decide what to do as far as headers are concerned. JBA's, BBK 1 3/4 or ported 00's?? Hey, why don't you try the new SLP pulley out for me while you're at it lol. 
Teching In
Joined: Feb 2005
Posts: 45
Likes: 0
From: Orange County
Haha! So how do you like the LS6 Intake? I've had mine on for a few weeks now and felt a noticeable power gain. What's weird is I didn't gain anything at the track 
It should work well with the cam though. As far as the JBA's or BBK's, just try to find a set that's cheep.
It should work well with the cam though. As far as the JBA's or BBK's, just try to find a set that's cheep. 
QUOTE:Haha! So how do you like the LS6 Intake? I've had mine on for a few weeks now and felt a noticeable power gain. What's weird is I didn't gain anything at the track It should work well with the cam though. As far as the JBA's or BBK's, just try to find a set that's cheep.
Well, I got the LS6 intake mostly in anticipation of my head and cam swap. After the intake swap my butt-o-meter felt more response and slightly better upper rpm pull. I just found new, in the box JBA's for $225, so those are on the way. Have you already bought the comp 212/218, or is this the cam you want? Sounds like you'll have a similar setup to mine. I figured since I live in CA I'd spend my longtube money on shorties and use ported heads to make up the difference. I bought A set of ported heads from my friend who took them off his car when he went to a stroker. By looking around I found heads, cam and shorties for less than a brand new set of LT's.
Well, I got the LS6 intake mostly in anticipation of my head and cam swap. After the intake swap my butt-o-meter felt more response and slightly better upper rpm pull. I just found new, in the box JBA's for $225, so those are on the way. Have you already bought the comp 212/218, or is this the cam you want? Sounds like you'll have a similar setup to mine. I figured since I live in CA I'd spend my longtube money on shorties and use ported heads to make up the difference. I bought A set of ported heads from my friend who took them off his car when he went to a stroker. By looking around I found heads, cam and shorties for less than a brand new set of LT's.
Teching In
Joined: Feb 2005
Posts: 45
Likes: 0
From: Orange County
Yes, I purchased the cam and RPM kit (Ti retainers, PR's and Springs) few weeks ago from Summit. They were on backorder so I wont be seeing 'em until July 14th. Everything else (gaskets and seals) is sitting in my garage.
BTW, great deal on the JBA's!!! What y-pipe are you going with?
BTW, great deal on the JBA's!!! What y-pipe are you going with?
Right now I just have the SLP y-pipe and stock cats. I'm not sure yet? Technically I don't think there are any legal alternatives yet. I'm kind of waiting for an OBD II CARB legal cat. I saw that CARB is reviewing some of the aftermarket cat laws pretty soon. I think given some time there might be some 50 state legal OBD II cats. I'd like to just weld some high flow cats into my setup, because I already have the SLP y-pipe with a flowmaster merge collector welded in. It's a great y......minus the stock cats. 