I have a Toda stroker kit with a stock 4g64 crank. The weak points in the kit are the rods and crank. I've replaced the rods with Pauter rods, so that weak point has been taken care of. The big downside now is the rev limit. Toda recommends that the rev limit be set at a maximum of 7500 rpm's. I'd like to build this thing to rev up to 8500 rpm's. My question is: Can I replace the Toda 4g64 crank with a JUN or Tomei forged crank? The Toda kit is 2.3l but the JUN and Tomei kit is 2.2l, is that a problem? I could care less about the loss of 0.1l but I'm not sure if this is as simple as dropping in a new crank. The head is completely built to withstand high revs so that's not an issue. Any feedback or suggestions is greatly appreciated. Toda has been an expensive mistake.

Thanks.

 

I dont think that you can. Tomei and Jun are 85x94 Toda is 85x100.

 

You should have just gone with a stronger stroker kit. Ask Toda if the recomendation is set so low because of the rods or because of the crank. BTW I believ AMS has a 2.3 stroker which can be reved to 8500RPM for less the $2000

 

he should have gone with jun stroker, little more $$$ then toda but bulletproof

 

Not worth the money if you dont plan on going above 450hp IMHO

 

I realize that I should have gone with someone other than TODA. But, it's too late, lesson learned. Right now I'm making about 620 whp. The rods were a limiting factor when it came to HP which is why I changed the TODA rods to Pauter rods. The crank can handle the horsepower but can't handle high revs. Back to my original question: Can a JUN or Tomei crank be substituted for the stock TODA 4g64 crank?

If I had to do it again I would have gone with JUN or Tomei. BTW, AMS uses a stock 4g64 crank in their setup just like TODA so I'd still have the same problem.

 

3240, if you contact me through PM I can give you a viable solution to your problem. I would be glad to help out in anyway.

 

Ryan is the man

AMS says they're kit is good to rev that high so if they do use the same crank then AMS says you can rev to 8500 no problem.

 

The tomie kit uses the same crank as toda and anyone in america who would offer a kit. The factory mitsubishi 100mm crank.

The june kit is a custom crank at 94mm. You can put this in your motor but you will have like 6-1 compression. What I am saying here is the pistons you have will only work with 100mm crank.

The eagle rod for the 2g is the one that works for evos 4-8. There is a slight mod neccessary if you want to use evo8 bearings. Otherwise you can use the bearings for the 2g dsm cars.

Your current setup is certainly capable of 8500 redline. It may be your head and cam combo that needs improvement to get power up there.

What is fastination with revving to 8500? If you make the engine flow well to 8500 you will be sacrificing performance in the 5500 and below powerband. The whole reason you went with the stroker was to get power and torque sooner than with a 2.0. If you want power to 8500 you should go back to a 2.0 setup. Powerband width is genarally 2000-2500rpm. An extremely well setup combo will make power for 3000rpm. Where do you want your power to be??

I run high tens on pump with my 2.4 on pump gas in my lightweight car. I dont rev past 7000 in 3rd, 4th or 5th. No need to.

I have a factory 2.4 crank an eagle rods for sale in private section. And you can use the factory 2g pistons made for strokers. The valve reliefs are reversed and not a contact issue in the first place. If you want to get your panties in a wad over it you can enlarge the cutout for the exhaust valve to match the size of the intake cutout. or you can wait a few months and wiseco will have shelf stock pistons available for the evo8 by the end of the year.

 

94AWDcoupe,

The reason that I'm looking for a higher rev limit is due to the fact that I need to shift into 5th gear in the 1/4 mile which is costing me some time. My dyno charts show that I have very little power drop off at 7500 rpm's so the extra 1000 rpm's would be worthwhile. The head isn't problem, AMS sent my head to Forrester for a stage xxx. Cams are HKS 272's. I'm looking for the best of both worlds, nothing wrong with that.

BTW, I haven't worn panties in years.

 

Ya i heard bad things about the Toda stroker. I would have gone with Boost Solutions stroker (which they claim to rev to 9K) or the AMS Stroker (which they claim 8500K i believe) or the JUN Stroker (You pay out the A$$).

I would check the balance of the crank and everything and make sure everything is balanced. I think that if you got everything balanced and some stronger springs and lighter retainers i dont see a problem with getting to the 8500 mark with the TODA kit.

By the way guys i just got my crank, rods, pistons blueprinted and balanced. The crank was very very close to being balanced fromt he factory. It was 1/4 ounce off straight from the factory. After we got done with it we have it down to 1/10 of a gram. NICE Improvment!!!

Chris

 

The Toda kit is weak. I've had to replace the rods with Pauter since the kit comes with stock 4g64 rods. The pistons are awesome, but that's about it. At the time of purchase, Toda was the only available kit. Boost Solutions and Ams didn't have their kits yet. The 4g64 crank from Toda is balanced and blueprinted but they still don't recommend anything over 7500 revs. It's interesting the AMS, RNR, and Boost Solution use this exact same 4g64 crank and recommend an 8500 rev limit. Maybe Toda is being conservative and I don't have anything to worry about. I'm going to look into a Tomei crank as I believe it's 100mm and forged. If I had to do it again I'd buy Jun. Since I've had to replace the rods and possibly the crank Jun would have saved me money in the long run.

 

you get what you pay for, JUN isnt that much more $6000

 

Maki,

Couldn't agree more. Jun is worth the money in my opinion. I still have a pretty bad *** setup though. Toda pistons and pauter rods are a strong combo. Once I figure out the crank this setup will have as much potential as Jun. The only problem:
TODA $3200.00
Pauter $900.00
New Crank $1500.00
Labor: ?
I could have bought Jun from the get go.
Live and learn.

 

Thats true on most things. You get what you pay for. But by well respected companies you start paying for who has the name. Tomei makes a great stroker kit and they are not as expensive as the JUN kit. Dont get me wrong im sure the JUN kit is awsome but im also sure that you can get these kits that run paiter rods, and ross pistons with the 4G63 crank with 100mm throw and be just as good with a bigger displacement then the JUN kit and pay less then half for it. As long as the products are well manufactured you can get just as good of a package as the JUN with more options including bigger displacement or whatever. Anyway enough said. JUN is a great company and they make great products im not doubting that one bit.

Chris