Thus far, James Karger is the only person I am aware of whom has managed to get the OEM ECU to function with an aftermarket camshaft or with a boosted motor.
Thus far, James Karger is the only person I am aware of whom has managed to get the OEM ECU to function with an aftermarket camshaft or with a boosted motor.
I'd imagine it's difficult to run a car of that power level with a returnless system. Coming from other platforms that wreaked havoc at the higher power levels - a return style fuel system is much more forgiving.
That was sort of my answer, we had 2 days with it from the original post, customer took it to tx2k then was supposed to bring it back after....It never made it and we haven't done another. To be honest I don't think we will try either. Not safe and to many variables. 15k motec or 25k blown engine....or even worse car in a wall.
If you are content with the responses you have received, then it was successful.
Technically, your original question is still unanswered.
Everything following this statement is purely speculative and is the opinion of one lone keyboard hack:
Calvo has designed and tested a MONSTER of a TT package for the Gen V Viper. It's a 1200+ rwhp capable package. If you have driven a moderately sized turbo car, you are familiar with the somewhat non linear boost curve. Aftermarket ECUs like the Motec can help mitigate "that hit" when the turbo spools.
The OEM ECU was not designed with FI operating parameters. It can be tweaked to do a decent job and with smaller turbos ( what fun is that?) it would probably be a fun, slightly easier to drive and enjoyable package. As it stands with Calvo's package the OEM ECU appears to be overwhelmed with trying to control the power it produces.
Regrettably, you are not wrong. You need only see the deleted posts in this thread to reveal that modified Vipers can be a sensitive subject.
This thread is approaching the twilight zone. Does anyone think a 1200hp, 3000 lb/rwd car can be easily controlled.
Most of those1200-1500 G2 TT cars had a motec or aem with traction control
The Supra on full tilt made just under 1400whp. I ran it around 1100whp on the streets. I had a AEM V1 from the stone age. No traction control or boost by gear. Never had any issues. I did have a 55 side wall tire in the rear. I'd feel comfortable driving a Viper with the same power level on the streets granted it wasn't on the stock rear wheels and tires. Damn I wish I could TT this thing.
I think at sub 1200whp traction control isn't a giant factor if you run 345/35/18 MT's, above that its just a safety cushion if you know what I mean? I'm with you though, I've been street racing a 1500+whp supra without traction control for 5+ years. I do use boost by gear and think something like that is a must for big power.
I'm just saying for the average guy that has never had a fast car, TC is going to make everything safer. Look at all the guys that wreck stock Vipers?! A car that is ridiculously easy to drive.
having owned both making well over 900whp, the Viper was MUCH easier to make hook. Supra is hard to hook because it goes from no power to a bunch of power in a split second. Viper pulls into power with the tires already loaded.
My 1070whp GTS dead hooked on 18's and was still usable on 20's. My 1100whp Supra would annihilate the tires with anything other than 15" wheels and a big MT radial.
I've seen Calvo's tuner dismiss stock ECU tuning time and time again. I also read Calvo imply the Motec safety features would have prevented this accident.
You sound pretty stressed. I'm content to use the forum for answers to my questions. Maybe you should pick up a phone and call someone to give you a hug?
Just because an OEM ECU was not designed for forced induction doesn't mean it won't work. I could show you 1032480138410803810358105803018 aftermarket examples along with D3PE's on the Gen V but let's not make you any angrier. #hack
Last edited by Sticky; 07-11-2016 at 01:48 AM.
Junkie I agree with you 100%. If I hadn't sold it I would have definitely switched to an EMS with boost by gear and traction control. Your so right about people wrecking even stock Vipers. I never could understand why so many people crash stock Vipers?!?! The car is so easy to drive. Lack of experience maybe?
Your correct but though different cars, as Junkie stated (he has owned both) the Supra when running large frame turbos (80mm+) hits extremely hard and fast! Actually the most violent car I've personally every owned/driven. Not to mention the Viper can house much more rubber for the rear tires unlike the Supra. My 3.4l stroker made great torque numbers as well. The car is dead, dead, dead, 6,500rpms hold on tight for dear life to 9,000rpms!
Last edited by 7TH_SIGN; 07-11-2016 at 09:19 AM.
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