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i recently got a '87 sammi from a guy that tore it up pretty good. he had a v8 in it and took it out to replace the original motor. I dont know much about this unit than what is in the haynes manual. When driving the unit she screams at 3000 rpms and my top speed is 60mph at 4000 rpms. The gears seem to be low. anyone have any ideas?
 

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Amazingly enough, what you are describing is perfectly normal.

Your typical highway rpm on a 1.3 Samurai equipped with OEM differentials (3.73), transfer case gears and 205/75x15 tires is around 4k.

Remember, this is a Japanese car with a Japanese engine. That Japanese engine, if properly maintained, will drive that way all day for months and month and months...

My '88 Samurai equipped with a 1.6 8-valve Tracker engine, 4.625 ring & pinions and 30" tires does 65 MPH at 4000PRM regularly. The 1.6 is a slightly "stretched" 1.3...

For the BEST service information on your Samurai, download the Samurai Factory Service manual. It's FAR Better than the Haynes - which most of us use as campfire kindling. Really!

You can download the Samurai FSM for free at a number of websites - prominent among them is Ack's FAQ (see link in my signature). To find it, do a search for factory service manual .

I hope that this helps!
 

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Discussion Starter #3
thank you for your info. im kind of suprised. My temp gauge shoots so high i cant even see it after its warmed up but she runs good
 

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From the sound of it, I'll bet the gears have been swapped out at the diffs and maybe even at the t-case. There is a way to count flange revolutions to find out your gear ratios in both, but first, tell me if the front has a locker in it.

For the t-case, here is an article that shows how to count the revs...

Rock Monster 6.4
 

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for a V8 to have been in it he would have had to extend the nose (fenders and hood) and/or have a huge lift. The lift would have also fit some huge meats, and that always changes the gearing.
You need to confirm the ring and pinion 3.73 and the trans case gears.
You don't say what size rubber you have now... and their is a little typo with ack's stock size. 205/70R15 and they are about 26" tall... and remember guys put the size on "flotation" tires. If one brand says 31's, they may really be 30" or 32". Guys can't measure. ;)
But yea, the 1.3's do scream, but I could easily get way more than 60mph stock.
We need more info.
 

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Discussion Starter #7
well to be honest i dont know much about this unit. this is the first one that i have and it was free to me. The firewall was cut out for the motor and tranny to fit. He used it to pull sprint cars from the track, so its seen better days. Been throwing around the idea of replacing the whole drivetrain.
 

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the part about the temp gauge is particularly disturbing. From what it sounds like, it's either wired incorrectly or the gauge is dammaged. It should never go above half way durring normal operation. I've had mine pulling long climbs screaming up inclines on freeways in the desert in 4th gear at 6000 rpm and the temp gauge never went over 3/4.
 
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