# 93 Rx7 Ls2 Project. **URL:** \ **Category:** Builds\ **Created:** [March 18, 2008, 5:45am UTC](https://forums.speedlife.net/t/93-rx7-ls2-project/196180 "2008-03-18T05:45:59Z")\ **Posts on this page:** 1\ **Showing post:** 372
**Author:** ![tjZ28](https://avatars.discourse-cdn.com/v4/letter/t/9de0a6/32.png) [@tjZ28](https://forums.speedlife.net/u/tjZ28)\ **Post date:** [May 29, 2010, 11:12am UTC](https://forums.speedlife.net/t/93-rx7-ls2-project/196180/372 "2010-05-29T11:12:01Z")
> [@Oh, hi i upgraded your 240sx](https://forums.speedlife.net/t/oh-hi-i-upgraded-your-240sx/42299/21): > > Welp kinda bad news I guess. > > My friend has family in VA beach, so we trailored it down to ed, since he comes up twice a year or whatever it added to my decision of having him do it, especially after talking with him. So me and a few friends took a small vacation down there. > > Anyways, I had some coil issues it was breaking up I guess a few of the plug wires weren’t seated all the way, ran fine until over 4k. They end up taking my fenders off to get the the coils. All over my ignition system. Fixed that, but there’s still issues with my valve springs. Since I upgraded my valve springs last year I thought they would be fine, but they end up pulling two valve springs to check the K. They were clearly better than stock but not nearly what I need. > > You can see I’m probably getting valve float around 4k, these are just the graphs of the tune I have on it. Ed made 18 pulls just trying to iron this thing out as best as he could and get it to run ok with the valve float. You can clearly see where it looks it should go, but just kinda falls off. > > It still pulls like a raped ape, 550rwhp/650rwtq in a 2900 lb car is still quick, definalty not to its potential though. I’m probably going to hold off on the springs just drive it as is this summer, then next winter crank the boost up to the max on pump gas and get new springs. > [@When Toyota needs durability....](https://forums.speedlife.net/t/when-toyota-needs-durability/42227/22): > > I think it peaked at like 14 psi maybe. The fuel system and engine could handle pretty much anything I threw at it… i’m wondering what’s the highest boost I could run on pump gas. I refuse to use meth or racegas. No race gas? Fine… go E85!!! I’m running E85 and just over 600rwhp NA with a stock 85mm MAF and stock Ti catback on my car. Speed Density with an better exhaust and it might have 620+ in it. With boost E85 will help you even more. And with all the motor and plumbing in such a small space the cooling effect will be huge for you as well. Seriously, I thought somebody said there were pumps in your area, you should think about it. And you said the fuel system can handle all you can throw at it, so hopefully you won’t have to make changes there (figure you need roughly 30% more fuel). If you’re over 60% duty-cycle on injectors now you’ll want to bump those up. FWIW I’m running 80# injectors to support my 600rwhp, but I’m actually really low duty cycle (which I like) eve on the E85. -TJ --- _[View the full topic](https://forums.speedlife.net/t/93-rx7-ls2-project/196180)._