2 LS1 Irocs vs. Coyote and Cobra
06-03-2014, 12:00 PM
#1
2 LS1 Irocs vs. Coyote and Cobra Buddies of mine in LS1 Iroc's showed up and an svt meet. Were able to get some good friendly runs in Mexico after the meet. No drama no bs just good clean fun.
2 LSx 3rd gens vs Coyote 5 0 and 04 Cobra
06-03-2014, 12:41 PM
#2
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nice runs! The LS third gens were running hard. If the white car cleaned up his 3-4 a bit he would have pulled it out a bit more convincingly. The cobra sounds mean.
06-03-2014, 03:20 PM
#3
He went from 5.0 TPI with an auto to learning how to drive stick in cammed LS1. The 2-3 shift looked spot on but it sounds like it's spinning and loses ground. Still a great race 
What kind of power does a pullied/ported blower Cobra put down?
What kind of power does a pullied/ported blower Cobra put down?
06-03-2014, 08:51 PM
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Good old heatons for the win. If he didn't have headers or any supporting mods, it's most likely around 470ish. Local guy with full bolt ons, pulley, and tune is making 470 with a non ported setup, but I didn't think porting them made a huge difference. Maybe 10-15 rwhp.
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06-03-2014, 11:14 PM
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For the first run, 480-500 rwhp. For the second run, 440-450 rwhp.
Good old heatons for the win. If he didn't have headers or any supporting mods, it's most likely around 470ish. Local guy with full bolt ons, pulley, and tune is making 470 with a non ported setup, but I didn't think porting them made a huge difference. Maybe 10-15 rwhp.
Good old heatons for the win. If he didn't have headers or any supporting mods, it's most likely around 470ish. Local guy with full bolt ons, pulley, and tune is making 470 with a non ported setup, but I didn't think porting them made a huge difference. Maybe 10-15 rwhp.
Porting does improve power but theres some give and take there. The Cobra blower is a Gen IV Eaton M90 1.8L blower. Its a small blower to start with and once heavily ported has lost even more mass. It pulls more PSI but will also heatsoak faster because it has less mass. And it will only make more boost to an extent. Once your over-spinning it or asking it to do too much with its volume it really doesn't matter. The ECU will just keep yanking ignition timing to keep the motor alive. A lot of Cobra guys get so far into porting and over-spinning their Eaton M90s that its like robbing peter to pay paul. They get stage 27 Posi ports and wonder why they only gained 4.5 HP.
Personally I would never modify an 03 Cobra Eaton past putting a smaller pulley on it to run the max safe PSI(14-16 PSI). From there you have two options. If your into the car for the short run you are better off buying the major support bolt-ons such as Long Tubes/exhaust + CAI + Gears. This way you will gain just as much power/speed BUT that extra money can also go towards a different FI setup down the road as opposed to dumping it into a mediocre at best supercharger. If you really wanna maximize the eaton setup you are MUCH better off spraying a 150 shot than porting it to the moon. Nicknamed "Spraytons".....this setup can actually run really strong and would make a great strip car. Plenty of spraytons in the 10s with a 100% stock Eaton M90.
If you are into the car for the long run you are best off to pulley the blower to 14 PSI, get basic bolt ons and then start saving your money for better FI. This means 2.8L+ KB/Big Whipple/Turbo or if you wanna be cute and different a Procharger F1A or something.
06-04-2014, 01:00 AM
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I've personally never seen much of a difference between ported and non ported setups. It's all in the tune and the tastefulness of the mods to the car. The local guy here has probably the strongest running eaton car around, and it's a stock un-ported blower. He just shifts it like a boss and the car is set up awesome. Another local guy has a killer chiller on his eaton car and it honestly seems to make the thing run pretty damn consistently with minimal timing pull, if any. Not sure how I'd feel about spinning my AC compressor during WOT, but if it works, it works. You can make an eaton car run damn good, but too many are just a pulley and intake and they range between 440-480 rwhp based on the weather, heat soak, etc.
06-04-2014, 01:21 AM
#12
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I've personally never seen much of a difference between ported and non ported setups. It's all in the tune and the tastefulness of the mods to the car. The local guy here has probably the strongest running eaton car around, and it's a stock un-ported blower. He just shifts it like a boss and the car is set up awesome. Another local guy has a killer chiller on his eaton car and it honestly seems to make the thing run pretty damn consistently with minimal timing pull, if any. Not sure how I'd feel about spinning my AC compressor during WOT, but if it works, it works. You can make an eaton car run damn good, but too many are just a pulley and intake and they range between 440-480 rwhp based on the weather, heat soak, etc.
06-04-2014, 09:18 AM
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Its sadly true. Obviously not quite that much of a drop. But especially with DIG runs or time to sit around after a pull those things get hot quick. Believe it or not idling is the worst for PD blowers. As long as the car stays rolling and fresh air stays on the heat exchanger it can string pulls together and not loose too much ignition timing.
Porting does improve power but theres some give and take there. The Cobra blower is a Gen IV Eaton M90 1.8L blower. Its a small blower to start with and once heavily ported has lost even more mass. It pulls more PSI but will also heatsoak faster because it has less mass. And it will only make more boost to an extent. Once your over-spinning it or asking it to do too much with its volume it really doesn't matter. The ECU will just keep yanking ignition timing to keep the motor alive. A lot of Cobra guys get so far into porting and over-spinning their Eaton M90s that its like robbing peter to pay paul. They get stage 27 Posi ports and wonder why they only gained 4.5 HP.
Personally I would never modify an 03 Cobra Eaton past putting a smaller pulley on it to run the max safe PSI(14-16 PSI). From there you have two options. If your into the car for the short run you are better off buying the major support bolt-ons such as Long Tubes/exhaust + CAI + Gears. This way you will gain just as much power/speed BUT that extra money can also go towards a different FI setup down the road as opposed to dumping it into a mediocre at best supercharger. If you really wanna maximize the eaton setup you are MUCH better off spraying a 150 shot than porting it to the moon. Nicknamed "Spraytons".....this setup can actually run really strong and would make a great strip car. Plenty of spraytons in the 10s with a 100% stock Eaton M90.
If you are into the car for the long run you are best off to pulley the blower to 14 PSI, get basic bolt ons and then start saving your money for better FI. This means 2.8L+ KB/Big Whipple/Turbo or if you wanna be cute and different a Procharger F1A or something.
Porting does improve power but theres some give and take there. The Cobra blower is a Gen IV Eaton M90 1.8L blower. Its a small blower to start with and once heavily ported has lost even more mass. It pulls more PSI but will also heatsoak faster because it has less mass. And it will only make more boost to an extent. Once your over-spinning it or asking it to do too much with its volume it really doesn't matter. The ECU will just keep yanking ignition timing to keep the motor alive. A lot of Cobra guys get so far into porting and over-spinning their Eaton M90s that its like robbing peter to pay paul. They get stage 27 Posi ports and wonder why they only gained 4.5 HP.
Personally I would never modify an 03 Cobra Eaton past putting a smaller pulley on it to run the max safe PSI(14-16 PSI). From there you have two options. If your into the car for the short run you are better off buying the major support bolt-ons such as Long Tubes/exhaust + CAI + Gears. This way you will gain just as much power/speed BUT that extra money can also go towards a different FI setup down the road as opposed to dumping it into a mediocre at best supercharger. If you really wanna maximize the eaton setup you are MUCH better off spraying a 150 shot than porting it to the moon. Nicknamed "Spraytons".....this setup can actually run really strong and would make a great strip car. Plenty of spraytons in the 10s with a 100% stock Eaton M90.
If you are into the car for the long run you are best off to pulley the blower to 14 PSI, get basic bolt ons and then start saving your money for better FI. This means 2.8L+ KB/Big Whipple/Turbo or if you wanna be cute and different a Procharger F1A or something.
06-04-2014, 09:26 AM
#16
Its sadly true. Obviously not quite that much of a drop. But especially with DIG runs or time to sit around after a pull those things get hot quick. Believe it or not idling is the worst for PD blowers. As long as the car stays rolling and fresh air stays on the heat exchanger it can string pulls together and not loose too much ignition timing.
Porting does improve power but theres some give and take there. The Cobra blower is a Gen IV Eaton M90 1.8L blower. Its a small blower to start with and once heavily ported has lost even more mass. It pulls more PSI but will also heatsoak faster because it has less mass. And it will only make more boost to an extent. Once your over-spinning it or asking it to do too much with its volume it really doesn't matter. The ECU will just keep yanking ignition timing to keep the motor alive. A lot of Cobra guys get so far into porting and over-spinning their Eaton M90s that its like robbing peter to pay paul. They get stage 27 Posi ports and wonder why they only gained 4.5 HP.
Personally I would never modify an 03 Cobra Eaton past putting a smaller pulley on it to run the max safe PSI(14-16 PSI). From there you have two options. If your into the car for the short run you are better off buying the major support bolt-ons such as Long Tubes/exhaust + CAI + Gears. This way you will gain just as much power/speed BUT that extra money can also go towards a different FI setup down the road as opposed to dumping it into a mediocre at best supercharger. If you really wanna maximize the eaton setup you are MUCH better off spraying a 150 shot than porting it to the moon. Nicknamed "Spraytons".....this setup can actually run really strong and would make a great strip car. Plenty of spraytons in the 10s with a 100% stock Eaton M90.
If you are into the car for the long run you are best off to pulley the blower to 14 PSI, get basic bolt ons and then start saving your money for better FI. This means 2.8L+ KB/Big Whipple/Turbo or if you wanna be cute and different a Procharger F1A or something.
Porting does improve power but theres some give and take there. The Cobra blower is a Gen IV Eaton M90 1.8L blower. Its a small blower to start with and once heavily ported has lost even more mass. It pulls more PSI but will also heatsoak faster because it has less mass. And it will only make more boost to an extent. Once your over-spinning it or asking it to do too much with its volume it really doesn't matter. The ECU will just keep yanking ignition timing to keep the motor alive. A lot of Cobra guys get so far into porting and over-spinning their Eaton M90s that its like robbing peter to pay paul. They get stage 27 Posi ports and wonder why they only gained 4.5 HP.
Personally I would never modify an 03 Cobra Eaton past putting a smaller pulley on it to run the max safe PSI(14-16 PSI). From there you have two options. If your into the car for the short run you are better off buying the major support bolt-ons such as Long Tubes/exhaust + CAI + Gears. This way you will gain just as much power/speed BUT that extra money can also go towards a different FI setup down the road as opposed to dumping it into a mediocre at best supercharger. If you really wanna maximize the eaton setup you are MUCH better off spraying a 150 shot than porting it to the moon. Nicknamed "Spraytons".....this setup can actually run really strong and would make a great strip car. Plenty of spraytons in the 10s with a 100% stock Eaton M90.
If you are into the car for the long run you are best off to pulley the blower to 14 PSI, get basic bolt ons and then start saving your money for better FI. This means 2.8L+ KB/Big Whipple/Turbo or if you wanna be cute and different a Procharger F1A or something.
So much misinformation in this post it's sickning....first off cobras didn't come with a M90.... Real life results I picked up 7 mph from going to a pullied eaton to a ported eaton. A big blower like that is pretty expensive and usually out of most peoples range when you can find ported blowers cheap every where. Porting the blower causes more heat soak? You mean some how removing material makes it hold more heat? Wtf ?! Is the blower probably the worst possible one for the car ? Yes it is indeed, but plently or ported eaton cars with SRA that are well thought out going 10s
06-04-2014, 09:43 AM
#18
So much misinformation in this post it's sickning....first off cobras didn't come with a M90.... Real life results I picked up 7 mph from going to a pullied eaton to a ported eaton. A big blower like that is pretty expensive and usually out of most peoples range when you can find ported blowers cheap every where. Porting the blower causes more heat soak? You mean some how removing material makes it hold more heat? Wtf ?! Is the blower probably the worst possible one for the car ? Yes it is indeed, but plently or ported eaton cars with SRA that are well thought out going 10s
Works great here on my fox with an aftercooler. I can run more timing with it on pump than I could with meth and aftercooler. Running around in OC in stop and go traffic it worked great. The older kits had a lot of problems with leaking. Lots of Cobras in MD run it
