28 pounds no meth!
Your advice seems a bit rash. What do you mean he can run 28# with no problem on pump gas? Just because Mellon can run at 30# with a 35R on 93 octane pump doesn't mean that you can run that much boost safely on 93 with a IX turbo.
You'd actually be surprised how much timing you can run on a IX with a Green at that level of boost on pumpgas with no meth. We have been doing this for awhile but I am not sure that it really makes as much power as the risk of potential problems is.
I am not afraid of the strength of the stock bottom end. I am in complete agreement with Scott though, built means jack. Have something go wrong on good fuel and the same stuff will happen sooner or later:
With all that being said, I have run 30psi on 92 with 1* at peak boost and 13* out the top. Bryan (Razorlab) can correct me but I believe he got 29 on 91 octane with similar timing. We were both on Greens and pump at the time. I sold my Green/S1s/Injectors to someone and they are replicating the same results and making 415whp with little cams.
I dont think its necessary and I dont mean to say it and seem to suggest that it is. It can be done, it is done, all without knock or damage. However as Q pointed out if one thing goes awry you are that most closer to the edge (Imagine the Coyote already over the edge of the cliff waiting for the dust to clear) and something bad will happen.
I am not afraid of the strength of the stock bottom end. I am in complete agreement with Scott though, built means jack. Have something go wrong on good fuel and the same stuff will happen sooner or later:
With all that being said, I have run 30psi on 92 with 1* at peak boost and 13* out the top. Bryan (Razorlab) can correct me but I believe he got 29 on 91 octane with similar timing. We were both on Greens and pump at the time. I sold my Green/S1s/Injectors to someone and they are replicating the same results and making 415whp with little cams.
I dont think its necessary and I dont mean to say it and seem to suggest that it is. It can be done, it is done, all without knock or damage. However as Q pointed out if one thing goes awry you are that most closer to the edge (Imagine the Coyote already over the edge of the cliff waiting for the dust to clear) and something bad will happen.
Last edited by JohnBradley; Mar 11, 2009 at 11:49 PM.
Those pistons are JEs by the way (also not mine). My stock bottom end has survived 30psi on pump, E30, E85, and E98 from both the stock turbo and the Green. Ethanol is obviously not going to be the same as 93 but the cylinder pressures generated by the increased timing still will affect the bottom end.
I have one customer with a 35R that runs 28psi on 91 with no knock and good timing (relative to some people maybe) 2-3* peak and 13* out the top.
I have one customer with a 35R that runs 28psi on 91 with no knock and good timing (relative to some people maybe) 2-3* peak and 13* out the top.
I know that English, Mellon and Razor can fine tune a stock turbo car to run over 28# on pump gas. They probably work their way up to that level of boost though and log judiciously. But, I don't think that the OP had a custom tune done to enable him to run that high of a boost level safely.
If he has one of these topnotch tuners custom tune his car, then I would feel confident that it was safe to run 28# on pump, otherwise he's playing with fire.
If he has one of these topnotch tuners custom tune his car, then I would feel confident that it was safe to run 28# on pump, otherwise he's playing with fire.
I know that English, Mellon and Razor can fine tune a stock turbo car to run over 28# on pump gas. They probably work their way up to that level of boost though and log judiciously. But, I don't think that the OP had a custom tune done to enable him to run that high of a boost level safely.
If he has one of these topnotch tuners custom tune his car, then I would feel confident that it was safe to run 28# on pump, otherwise he's playing with fire.
If he has one of these topnotch tuners custom tune his car, then I would feel confident that it was safe to run 28# on pump, otherwise he's playing with fire.
like i said what do i know rite...
Mellon tuned his own 35R car to run 30# safely on 93 octane. Nowhere have I read that you can safely run 28# on a 16G without a tailored tune. We really aren't arguing, are we. I respect your opinion.
The OP's tune isn't optimized to run 28 PSI on pump, or is it? John Bradley didn't tune the OP's car to run safely at 28 PSI on 93 pump, did he?
The OP's tune isn't optimized to run 28 PSI on pump, or is it? John Bradley didn't tune the OP's car to run safely at 28 PSI on 93 pump, did he?
I'm no-where near the tuner/authority of either JB or TTP, and as has been stated several quantifying parameters lead to a properly tuned/high boost but reasonably safe engine. High Boost alone won't kill as was mentioned. A 35R has much different characteristics at 30lbs than a 16G reaching past it vo2max..lol..
Sounds like the OP needs to re-visit his local tuner or contact either of the Tuners that have chimed in, both could help tune for this application. What we may have failed to discuss; Why is he suddenly overboosting past his target. The Tephra Mod using the the CEL as a way of gaging Knock might be something the OP should look into as well as contacting a qualified tuner.
That Piston had a Hot Spot...ouch...
Sounds like the OP needs to re-visit his local tuner or contact either of the Tuners that have chimed in, both could help tune for this application. What we may have failed to discuss; Why is he suddenly overboosting past his target. The Tephra Mod using the the CEL as a way of gaging Knock might be something the OP should look into as well as contacting a qualified tuner.
That Piston had a Hot Spot...ouch...
Last edited by Q@EvoPowerMods; Mar 11, 2009 at 10:35 PM.
im pretty sure theirs more good tuners like mellon and john bradley, so why not the tuner that tuned the op car??....im pretty sure if hes car was knocking it would be pulling mad timing and it would be running like crap..... and he would have stated that.....