building a 3.0L plus...

[Dreco]

anyone know the redline of a 3.0L stroker? I when I asked Rebello about my 3.0L they said, well, "everyone shifts at 7000" So I guess it's the same redline as before the mods??

[Gav240z]

Dreco depends greatly on how your car is set up. Depending on how your ignition is mapped and what your camshaft profile will allow it to rev to. Then if your running SU's they will top out at 7000rpm. With tripples they can breathe higher up.

However just cause you can rev to that doesn't mean you should check what bottom end preparation has been done and what valve springs etc..

It's one of those things that just depends

[panchovisa]

280zgod,

I attached a chart that I was unable to attach to a PM. Just hope the "copyright thread" doesn't see this post!

Building a multi-purpose car is full of compromises.

If you want to win drag races you need to get to the finish line first (at 80 mph or 120 mph, no difference) by having the quickest time. Using 3, 4, or 5 gears is not of any consequence.

Study the Datsun transmission gear ratios (you will probably want an overdrive 5-speed for dual purpose) and rear end ratios (you will definately want a limited slip for dual purpose). There are only so many choices available.

What option you do have to tune for dual purpose is the diameter of your tires. How about bigger diameter rear tires for the street and smaller (stickier) diameter tires for the strip? Or a 3.36 for the street and a 4.11 for the strip? It not fun changing rear ends, but if you can't accomplish what you want without it then thats that.

[kmack]

We should talk next Saturday at the Z show.

I'm going to be at the show for sure on Saturday. I'll hook with you when I get there.

[Gav240z]

Build whatever is in your budget and you think you'll be happy with. Maybe just maybe for now the wisest option is to build it to stock specs and then have it running nicely so you can save some money and build the stroker later.

Or if you think you can get away with it just keep driving it and save money and rebuild the thing in 1 go.

[280zgod]

well i i fixed my compression problem. head gasket was ruptured on the two cylinders. had the head completely redone and polished and had a stage 3 cam installed for 400 dollars. im waiting on nissan for my new timing chain and sprockets and a new crank pulley since mine busted. but i drove the stage 3 cam with no radiator or fan and my bad timing chain on the cold lash settings and wow the difference is awesome im loving the speed increase. shorter gears and my new throttle body and ill have a beast. some said my idle wold be terrible but the MSD controls it nicely. it sounds drag carrish but the ride is smooth even with off timing. so this weekend im gonna try and put it together with the new parts and take it to the track. thanks for the earlier info on the stroker. ive decided to leave this one as is for now. the stage 3 cam is quite nice with my setup. my next z will get the stroker and im saving up for that supercharger from jim cook racing if its still available cuz that sounds like it would be a good mate for the stroker. anyway thanks again guys wish me luck on the repairs this weekend.

[sblake01]

If I were you, I wouldn't be running that freshly installed head gasket too long (if at all) without some kind of cooling.

[280zgod]

oh yeah i know i only drove it home from the shop, not even going above 3000 rpms, which is like 4 miles to 5 miles, but that last 1/4 mile stretch from the stop sign to my driveway, oh yeah that was some good ole fashioned acceleration. the engine is already dissassembled again i took it apart last night. thanks for the concern, later. ~Jerrod

[sblake01]

It just seems like a lot of wasted time, effort, and money to tear an engine apart several times to accomplish what could be done with one tear down. The 'concern' should be yours, it's not my car. It was just an opinion. While I do not consider my self a "master" as you signature line states I do have a lot of experience with these cars and you do seem to be soliciting advice.

[280zgod]

my mechanic told me it would be ok to drive home and i trust him. he used to own two of these and has worked on alot of them. also it would have been one tear down but my crank pulley broke after i put the thing back together and started it (rediculous two piece crank pulley why couldnt it just be one piece it makes so much more sense then having a second pulley stuck to the first by a thin rubber seal) and the non nissan timing plate gasket sprung a water leak because it didnt have the necessary "divet" in it. my mechanic told me i should get a new timing chain even tho mine hasnt stretched much because its a high end cam and will stretch more if i dont change it. so no matter what the case it needs to be taken apart twice there was no way to foresee the breaking crank pulley or the worn out chain, since i have no idea what a worn out chain looks like, but i would assume it is since it is the original like most parts on this car. im amazed it runs as well as it does or at all sometimes... yeah but i dont mind the tear down it took me an hour to get it apart again it isnt hard and my mechanic ordered me factory parts through his source so it isnt costing as much as it would have with nissans astronomical prices. i enjoy the learning experience anyway. yes i am concerned for my car and that why i only drove it the 5 miles home and then pulled it apart to fix the few problems i made or that occured on their own. Anyway good times good times. working on the z is what im off to do now later everyone and btw your opinion was appreciated stephen. ~Jerrod

[sblake01]

Well, Jerrod, I guess if I could think back that far, I'd remember that that is the same way I learned how to work on them. :classic: