Supercharged ISF hits 190.01mph in Mojave Mile

[davcrz5]

It's been while since I've posted up any new info for my fellow enthusiast regarding RRRacing supercharger kit for ISF as well as tune and tuned intake. He was disqualified for his last run due to not having a roll cage and breaking rule of going over 190 he ran 190.01mph.

Currently you have three different setups
570 kit which puts out 530whp
620 kit running E85 which puts out 570whp
Custom kit utilizing meth injection 619whp 500tq

FBO Tune, Tuned Intake and AOS 430whp on average plus or minus 5hp to 10hp depending on car and dyno.

[dparm]

Damn. Is the rest of the drivetrain stock?

[davcrz5]

Originally Posted by dparm

Damn. Is the rest of the drivetrain stock?

Yes stock internal, ISF comes with forged crankshaft journals polished to a mirror finish. To minimize the friction generated between the connecting rods and the crankshaft. Forged sintered connecting rods. High-flow cylinder heads designed by Yamaha with lightweight valvetrain, including forged cam lobes on hollow, chain-driven camshafts, with Titanium valves are operated by roller rocker arms. Piston are weak leak they are cast.

There are two or three engine builds going on right now we're guys are switching over to forged pistons and beefing up a few other components.

[dparm]

Originally Posted by davcrz5

Yes stock internal, ISF comes with forged crankshaft journals polished to a mirror finish. To minimize the friction generated between the connecting rods and the crankshaft. Forged sintered connecting rods. High-flow cylinder heads designed by Yamaha with lightweight valvetrain, including forged cam lobes on hollow, chain-driven camshafts, with Titanium valves are operated by roller rocker arms. Piston are weak leak they are cast.

There are two or three engine builds going on right now we're guys are switching over to forged pistons and beefing up a few other components.

I was actually curious about the Aisin 8-speed auto being able to take that kind of power.

[davcrz5]

That's definitely one of the big questions with the ISF owners will it hold the additional tq? For years,guys using nitrous have been exceeding tq threshold of AA80E trans of 405tq for years now with no apparent issue. Like Supra it has low rating but Supra with stock trans were and are routinely making 700tq,800tq as high as 1000tq on stock transmissions.

ISF, RCF& GSF share same basic trans layout some tweaks were done for RCF & GSF but they have same 405tq top number, but from engineering standpoint that makes no sense since RCF makes 389tq thats kind of to close for comfort unless they know full well that trans can handle far more than what they saying.

We also thinking maybe RRRacing is limiting boost in 1st n 2nd gear via tuning to help transmission from grenading from the initial impact of torque . This has been done for years and other platforms .

[davcrz5]

Dyno run with ethanol 570whp

[dparm]

Originally Posted by davcrz5

That's definitely one of the big questions with the ISF owners will it hold the additional tq? For years,guys using nitrous have been exceeding tq threshold of AA80E trans of 405tq for years now with no apparent issue. Like Supra it has low rating but Supra with stock trans were and are routinely making 700tq,800tq as high as 1000tq on stock transmissions.

ISF, RCF& GSF share same basic trans layout some tweaks were done for RCF & GSF but they have same 405tq top number, but from engineering standpoint that makes no sense since RCF makes 389tq thats kind of to close for comfort unless they know full well that trans can handle far more than what they saying.

We also thinking maybe RRRacing is limiting boost in 1st n 2nd gear via tuning to help transmission from grenading from the initial impact of torque . This has been done for years and other platforms .

Where did the 405 number come from? And what does that mean, exactly? If you make 406 it instantly explodes?

The answer is probably that 405 is the conservative limit for a reasonable lifespan (warranty duration?). Like anything else, you can go higher, but the lifespan drops dramatically.

[davcrz5]

Originally Posted by dparm

Where did the 405 number come from? And what does that mean, exactly? If you make 406 it instantly explodes?

The answer is probably that 405 is the conservative limit for a reasonable lifespan (warranty duration?). Like anything else, you can go higher, but the lifespan drops dramatically.

This information came from SAE technical service papers regarding AA80E 8 speed automatic transmission with Novell powertrain system.

And yes it's Toyota being typical Toyota which means them being conservative. They always over engineer their parts especially there high performance vehicles. So yes that 405lbs tq is there conservative number they use. Anything over that may impinge on the life expectancy of transmission.

With that being said like I stated earlier several guys using nitrous have exceeded that number I'm currently at 403 foot pounds of torque and have been there for 2yrs now, RRRacing has been using there supercharged ISF now for over 2yrs. It's been tracked at several race track on east and west coast. RRRacing driven hard at actual race events across country. Still on original transmission. With countless Dyno pulls during testing and development of the parts they currently make for the ISF that includes the supercharger and tune as well as tuned intake and a few other components as well, this has been there test mule and race car for yrs. They are work With Lexus European race team which is using their tune on their race cars. So he's pretty smart guy.

RRRacing also works on Toyota Ford and Mazda the owner of the company has his BS and MS in Engineering at Lehigh and Carnegie Mellon Universities, Rafi worked as senior engineer specializing in advanced alloy development at a major aerospace & defense company. But his passion has always been cars he's a great guy and sponsored events at Pocono Raceway. He's always accessible via phone or email always willing to help anyone out including other shops that are using his parts.

[New2Roundel]

From a speed perspective, this doesn't seem all that out of the ordinary---high hp equals high speeds. I saw a porky current gen mustang GT (stock interior and suspension) with a bunch of boost hit 170 mph in the half mile. From a durability perspective, I'd rather see how the car holds up after a full track day, not just a handful of 1 mile romps.

It's more interesting to see that someone out there is playing with the ISF cars because they always seemed like a decent platform for some extra hp.

[TTony]

For comparison, what does a SC'd M3 run? I read about a stroker SC'd M3 trying for 200mph but not sure where that ended up.

[Richbot]

Is this kit going to port over to the GSF eventually? Because I heart that thing.

The Toyota UR V8's seem like they're up there with most reliable motors they have ever made and that's saying something.

[davcrz5]

Originally Posted by AddicLee

How did you hit 190mph I thought the governor stopped the isf around 160 ?? Did the rr tune remove that ??

ISF speed governor is set to 170mph in its stock configuration, and yes RRRacing Tune does remove speed limit of 170mph.

[Ml427]

pretty impressive

[davcrz5]

Originally Posted by Richbot

Is this kit going to port over to the GSF eventually? Because I heart that thing.

The Toyota UR V8's seem like they're up there with most reliable motors they have ever made and that's saying something.

Yes supercharge kits are now available for following cars
ISF RR625 KIT N RR670 KIT
RCF RR670 KIT
GSF RR670 KIT

GEN 3 RRRacing 430 kit
IS350
IS300
RC350
RC300
GS350

[davcrz5]

S/C ISF VS C7 ZO6 Half mile not what most people expected for outcome.

[davcrz5]

Originally Posted by New2Roundel

From a speed perspective, this doesn't seem all that out of the ordinary---high hp equals high speeds. I saw a porky current gen mustang GT (stock interior and suspension) with a bunch of boost hit 170 mph in the half mile. From a durability perspective, I'd rather see how the car holds up after a full track day, not just a handful of 1 mile romps.

It's more interesting to see that someone out there is playing with the ISF cars because they always seemed like a decent platform for some extra hp.

They race protype for a year at several different race tracks across the country prior to even announcing that the system was ready here are a few videos of ISF and RCF racing on the track

Testing S/C kit by racing at several tracks back in 2016

[Richbot]

Let’s not call track days “racing” shall we

I have a plan to buy lots of Toyotas by the bushel and supercharge them and resell them like Bob Lutz with the Fisker Karma. We offer a full line of stupidloy powerful reliable cars and trucks with clunky infotainment and they will only be sold in beige with chrome wheels just to troll the youths

[quiksi]

that's awesome! now let's talk about the music selection... you're at a 10, and we need you at about a 2

[davcrz5]

Originally Posted by quiksi

that's awesome! now let's talk about the music selection... you're at a 10, and we need you at about a 2

Yes very true LOL

[shimmy23]

I've always liked the styling of this car and considered it when moving back into a sports sedan. unfortunately, the back seat was too small for my babies.

enjoyed the vids!

[davcrz5]

Once the ECU was cracked it was a game-changer for the ISF prior to that the only real power mods that were available were headers exhaust intakes, but the car responded extremely well to those mods.

But now with the Advent of the tune and tuned Intake which increases MAF housing from 82mm to 87mm with large KN cone filter allowing for increased Air volume. And now supercharging as well as running ethanol the ISF is now coming into its own. Strongest points for me are on track road racing and these half mile mile racing events. 1/4 mile they are having problems putting down the power.

And it's not just in the horsepower department where there have been significant changes more and more companies have developed suspension for ISF such as Penske , ohlins, KW of course, Figs Engineering, RRRACING and several others.

My setup is currently FBO, RRRacing Tune and Tuned Intake system also running E30 mix with Zeitronix E hacker ethanol content analyzer.

My ISF

[chrisg123]

I hit 175 in my AA level 2 manual e92. If i had better suspendion i tiink 200mph would b easy.