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.
400-440-460-500. What is the magic "Rear Wheel" number to avoid the old rod threw the engine block? I ask because I will be installing the Whipple HO kit here in the next two weeks. I want a safe tune with no kaboom, just plenty go baby! I know some with FI kits are around 450-475. Can you tell me if you have had any problems? Are you running lean? My goal is 450-460, with no kaboom! Can I do this in a safe manner. I'll be going ordering a mail oder tune from VMP Tuning. Has anyone done this? I'll be running this mail order tune until I can get my car dyno tuned.
Your feedback is greatly appreciated.
Though its not the final number that is the problem -it is the correct tune and if the parts that deliver the fuel hold up and not have any failures...... I believe that I was the one the got the terrible word "Kaboom" in your head and I want to dispel that. That was a worse case senario I gave you and since you are getting the GT500 pumps and DM with the Whipple install you should be fine with the numbers you are looking to achieve! I say this cause the new Whipple's are much more efficient with the same boost numbers for the Gen I Whipple. Ex- I am at 11-12 psi and run about 465 RWHP. You should accomplish this with the Gen 2 at 10 psi or lower from what I have seen. Make sure to ask the tuner what timing the car is running at WOT and if he feels it is aggressive or not too advanced. (report the number here with dyno sheets too and we can tell you!). If your A/F ratio is in the 11's (low 11's) and see what the A/F is at WOT in the upper RPM ranges as well as IMO that is where fuel when starved can cause problems. If you were not planning on a dyno tune after the install just triple check your work and load the Whipple tune as it is rich throughout the rpm range for my experience with the tune from Whipple. I had run that tune on the first pull and put down 455 RWHP and my tuner (modified the tune from there with his own tunes). I had to bring it back for cold start up issues and since had the new tune with no issues at running 465 RWHP (yes it was a bit cooler and less humidity with the second dyno session and the first pulls after initial install read 93 degrees outside and 67% humidity!) I was running pig rich with the first dyno session (with stock fuel pump in place and no BAP) at 6000+ rpms and 10.9 A/F ratio......definitely not starving for fuel IMO!!!! SO my advice is take your time and know there is NO magic number that the cars will be Safe with just make sure everything is installed and triple checked and running properly before your first WOT run. Most do agree that 450 RWHP is safe but that number means nothing to the parts that make the motor work....... JMO and enjoy and have fun and reap the benefits of your labor! J
It's a fact that fuel pumps and delivery systems can and do fail. I sure hope that in the event of such a failure that a blown engine is not a sure thing. Because that is seriously BS.
beed around 498 whp 478 wtq @ 10.2 psi for about a month and a half, no probs yet! VMP email tune should be pretty good and safe. When justin dyno tuned mine, he started out with his email tune and tweaked it from there.
Im using the ford racing tune that it came with and everything is fine. 440whp exact on the dyno. I know couple people on the forums that have no problems with this tune.
Americanspeed - Just noticed you track time in your sig. 117mph is pretty good but I would have thought at 500rwhp you would be around 120mph.
I plan on hitting the track in december.
Yeah it is slightly low. Weather conditions were pretty crappy though, hot and humid, mid 80s with 80+ % humidity. When fall/winter comes around, I should be hitting 120s. With the stock clutch, I am getting some slip as well, plus I was still getting use to the engagement point on the stocker, I was so use to having to put the clutch down to the floor with the spec 2+ to shift, my shifting with the stock clutch can see some room for improvement. One comparison though was a paxton charged shelby mustang, I believe 11 lbs or so, trapping 112 the same night.
09-08-2008, 04:24 PM
