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Originally Posted by TheSnail
dont expect a ka to hold together with stock internals. sr is capable of 450+ stock internals, but for what a good sr cost, is what you can build a ka. And in the end it is a preference of (sr) rpms(good thing for turbo motors) or (ka) ( a butt load of torque).
do research, Im sure people in this forum have explaing this topic to there last breath, You will find alot more info if you go to your post title, copy it, then paste it in the search block. enjoy
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Tell that tp TY Yap in AZ. who has had a KA-T over 310rwhp for 4 years and no problems. Or Dennis in GA who made 350rwhp about 2 years ago and is still running strong on stock internals.
Stock block Sr's are capable of 573rwhp uncorrected. I have seen it with my own two eyes.
There is also rumored to be a sohc KA making in the 500's and a DOHC KA making closer to 650 both supposedly on stock internals. They are in a Toyota Starlet, and a Datsun 510 both cars setup for drag only and residents of the Kissimmee, Orlando area. When I was at the shop that tuned/built them, thats what the owner claimed. I know the owner pretty well he does not have a reputation of lying.
KA is way more fun to drive. I have had a 412rwhp KA, and currently have a 387rwhp SR. I prefer the KA hands down. The torque for the KA was 412 as well but for the SR a mere 314. Torque is what makes the car "feel" fast. Both cars ran nearly identical track times on street tires.