When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
2007 LS2 6 speed automatic with
Kooks 1⁷/⁸ headers, 3" h pipe no cats and Borla ATAK. Like this its loud as hell.
The E Force is the base kit with 3.85" pulley, stock fuel pump. Also has a Mighty Mouse catch can. Very basic stuff.
At the tune it made 5.5 psi boost, 440 max WHP at 5700 rpm and 449 max tq at 4550 rpm. It was at 435 tq at 3700 rpm. It was 55 degrees outside.
These LS2 cars make about 355 whp in factory trim.
The car seemed to feel faster with the E Force, stock cats and H pipe with Borla ATAK mufflers.
Thats all she wrote.
interesting... i figured the exhaust would help the top end a bit more than that, but it felt faster before, huh?
either way, not bad at all for low boost & a stock fuel pump.
2007 LS2 6 speed automatic with
Kooks 1⁷/⁸ headers, 3" h pipe no cats and Borla ATAK. Like this its loud as hell.
The E Force is the base kit with 3.85" pulley, stock fuel pump. Also has a Mighty Mouse catch can. Very basic stuff.
At the tune it made 5.5 psi boost, 440 max WHP at 5700 rpm and 449 max tq at 4550 rpm. It was at 435 tq at 3700 rpm. It was 55 degrees outside.
These LS2 cars make about 355 whp in factory trim.
The car seemed to feel faster with the E Force, stock cats and H pipe with Borla ATAK mufflers.
Thats all she wrote.
You could easily add the 3.5" pulley for a little more boost. Would probably be at about 7 to 7.5 psi. Probably pick up 30 hp/tq. You still have enough fuel pump and injector for that also. You can get the 3.5" pulley from Summit. Would need an adjustment to the tune if you have a custom tune. If you are using the Edelbrock tune, you just add the pulley and go. Doubt you would need to change your belt either.
Another excellent upgrade that is relatively cheap is the Racetronix Fuelpump Hotwire. It sends voltage directly from the alternator to the fuel pump. It will usually add about a volt more to power the pump which will increase its flow. This is actually a good upgrade for any Vette.
You could easily add the 3.5" pulley for a little more boost. Would probably be at about 7 to 7.5 psi. Probably pick up 30 hp/tq. You still have enough fuel pump and injector for that also. You can get the 3.5" pulley from Summit. Would need an adjustment to the tune if you have a custom tune. If you are using the Edelbrock tune, you just add the pulley and go. Doubt you would need to change your belt either.
Another excellent upgrade that is relatively cheap is the Racetronix Fuelpump Hotwire. It sends voltage directly from the alternator to the fuel pump. It will usually add about a volt more to power the pump which will increase its flow. This is actually a good upgrade for any Vette.
I have a 3.5 pulley but thought it would need a shorter belt.
It was dyno tuned but I dont think they were exp with it. The tailpipes have black on them and from 20 mph it doesnt feel as strong.
The wide band goes to 12 -12.5 under boost. At 40 mph it swings between 14 - 10 or 14 - 12.
Same shop put headers on it but theres a leak at this ball socket. Looks like they tightened one side all the way before starting the other side. Probly should have tightened it more evenly.
I have a 3.5 pulley but thought it would need a shorter belt.
It was dyno tuned but I dont think they were exp with it. The tailpipes have black on them and from 20 mph it doesnt feel as strong.
The wide band goes to 12 -12.5 under boost. At 40 mph it swings between 14 - 10 or 14 - 12.
Same shop put headers on it but theres a leak at this ball socket. Looks like they tightened one side all the way before starting the other side. Probly should have tightened it more evenly.
What dyu think?
Hard to tell but it looks a bit off. Should be easy for you to correct.
As for the belt, you shouldn’t need a new belt but if you do, you should be able to get the belt you need if you have an Oreilly’s near by. You can find Gates belts in 1/2 inch increment sizes. For example, my car was using a K061030 belt which is 103.0 inches. I needed 1/2 shorter so got the K06102.5 (102.5). You can get 3 or even 4 belts in different sizes and see which one fits best and return the others.
As for tuners, some not good, some are okay, and some are great. I had my car tuned after adding my E-force and he did okay but I ending up going to a second tuner and he really dialed in the tune.
As for your AFR, for boosted, you should be closer to 11.
Really depends on where your tensioner is in its swing. If its pretty close to being loose you'd likely need a new belt. I was using the same belt on mine from 3" to 2.75" though and it was still really tight showing no signs of belt slip. Realistically though at your power level the stock cats/catback wouldn't have likely been a very big restriction which makes sense with the dyno numbers. AFR seems a bit on the rich side cruising and a bit on the lean side in boost but hard to say without seeing what it's actually doing and what the tune looks like. Overall if it's 12.1 at peak then it's not too far off given the low amount of boost.
Thanks guys, thats helpful info.
For the exhaust leak,
this morning i took the car back to the shop. They found one of the O2 bung plugs fell out. Once the plug was installed no more leak.
They also showed me the max injector duty cycle was at 75.4%. These injectors are part of the E Force kit. 52 pounders i believe.
Question:
To change pullys the throttle body has to be moved.
Can i just remove the 4 bolts that retain the t body and push it out of the way enuff to access the pulley bolts?
Thanks guys, thats helpful info.
For the exhaust leak,
this morning i took the car back to the shop. They found one of the O2 bung plugs fell out. Once the plug was installed no more leak.
They also showed me the max injector duty cycle was at 75.4%. These injectors are part of the E Force kit. 52 pounders i believe.
Question:
To change pullys the throttle body has to be moved.
Can i just remove the 4 bolts that retain the t body and push it out of the way enuff to access the pulley bolts?
Thanks
Yeah, that's all you have to do, leave the belt on it while you break the blower pulley bolts loose to keep from having to fight it too much but other than that it's exactly as you said.
2007 LS2 6 speed automatic with
Kooks 1⁷/⁸ headers, 3" h pipe no cats and Borla ATAK. Like this its loud as hell.
The E Force is the base kit with 3.85" pulley, stock fuel pump. Also has a Mighty Mouse catch can. Very basic stuff.
At the tune it made 5.5 psi boost, 440 max WHP at 5700 rpm and 449 max tq at 4550 rpm. It was at 435 tq at 3700 rpm. It was 55 degrees outside.
These LS2 cars make about 355 whp in factory trim.
The car seemed to feel faster with the E Force, stock cats and H pipe with Borla ATAK mufflers.
Thats all she wrote.
Something seems off you should be making more power. My LS2 with headers, Calloway intake and baby cam makes the 435 RWHP on a mustang dyno. Upgrade your injectors, pulley down, and add meth and you should yield well over 500 RWHP
As a follow up to the OP from the OP.
I felt power was down so I took my car to a far more experienced shop here in the Chicago area called Speed Inc. No changes were made to the combo as indicated in the 1st post other than adding a Kenne Bell BAP.
They did a dyno tune including trans tune, its an A6.
On 5 psi boost it made 481 whp and 480tq by 3600 with a max of 484 tq. Most notable was how much better the trans worked while moving in and out of traffic on the interstate.
They also did an oil change and trans service.
Thats all for this one. Next year I want to trade for a C6 Grand Sport manual or C7 Stingray A8 or manual.
Thanks
EForce LS2 Dyno HP
