redline of 3mz and 3/1mz hybrid

[TMMK Toy]

So I've been wondering what the redline on a stock 3mz is? I think I read somewhere it's a measly 5900 rpms. Any validity on this? And what is the limiting factor? And wondering with 1mz heads if it's safer to rev higher or if the low redline is due to the bottom end's limitations. Figured Gabe might be able to field this one. I ask because I'm thinking of selling the eight six to get a NA SW20 and do a v6 swap. Just debating on the 3mz/1mz hybrid or just a straight up 1mz. Course that is if I decide to go this route. I'm half leaning this direction and the other half is leaning on keeping the eight six and doing a 1uz swap.

[TMMK Toy]

Bumping this up in hopes of some response.

[ThatVietGuy]

I believe the rev limit of an engine has a lot to do with the head(s), particularly the cams. As you rev an engine higher and higher, the cams have a lot of work to do to be able to keep the valves in sync with the timing of firings and whatever. Get it out of sync and your valves start tapping the piston or you don't get the right amount of air into the cylinder.

So, I think you would be able to rev the 3MZ block to 6200 RPM.


P.S. I'd just keep the 86. You already have the lightweight, RWD platform. Plus, there are quite a few engines that can go in.

[CASTRO]

limitations could also include crank bearings as they was the issue with 350z motors being revved past their expected range. In an engine buildup by SCC magazine, they compared that the RB motors bearings contained more lead etc and its what they used to rebuild the 350z VQ.

Other factor that could be limiting could be what
ThatVietGuy was referring to; the head. Cams to take advantage of the higher reving motor would be needed since stock cams are made to make power lower and with higher RPMs, it could just be all turbulence w/no valve overlap etc. My theory could be related to valves which may be too heavy since a few built 1MZs have swapped valves for the 2zz celica valves. Valve springs comes in next to prevent valve float and seems to help with Tony the Tigers build. i saved pictures of Tony comparing stock vs. aftermarket valve springs somewhere.

I believe I read Tony revs a hair past 7000rpm with his current setup.

hope that helps any

[DatSRBoi]

limitations could also include crank bearings as they was the issue with 350z motors being revved past their expected range. In an engine buildup by SCC magazine, they compared that the RB motors bearings contained more lead etc and its what they used to rebuild the 350z VQ.

Other factor that could be limiting could be what
ThatVietGuy was referring to; the head. Cams to take advantage of the higher reving motor would be needed since stock cams are made to make power lower and with higher RPMs, it could just be all turbulence w/no valve overlap etc. My theory could be related to valves which may be too heavy since a few built 1MZs have swapped valves for the 2zz celica valves. Valve springs comes in next to prevent valve float and seems to help with Tony the Tigers build. i saved pictures of Tony comparing stock vs. aftermarket valve springs somewhere.

I believe I read Tony revs a hair past 7000rpm with his current setup.

hope that helps any

We both way pass 7k my friend haha.

[trd4life]

With the standard 3mz/1mz hybrids that i have been building, 6250rpms. I use the 1mz wiring harness and ecu, therefore i rev the hybrid engine the same as the standard 1mz. That's on stock 1mz heads rebuilt using OEM toyota parts.



With a standalone i would be comfortable revving the 3mz/1mz hybrid to 7000 on the stock heads.

Aftermarket valve springs and cams are an option though .....

[kingkakyle]

yes the 3mz redline is 5900

[TMMK Toy]

Thanks guys. So sounds like with the hybrid swap, could just rev it like a regular 1mz, which would be sufficient with me. Think I might make a separate thread on what platform to play with.

[usoff89]

I know this is a old post. In theory, the only thing you are using for the 1/3mz hybrid from the 3mz is the bottom end (block)? So basicly I could buy a 3.3 block and put my 1mz heads on it and be ready to roll? I'm about to buy another engine to start a performance build for the solara, and this could be another way to go. A supercharged 3.3L 1mz/3mz sounds pretty good!

[KILLA CAM]

Go for the 1UZ swap!!!

[Mr_Krispy1183]

I know this is a old post. In theory, the only thing you are using for the 1/3mz hybrid from the 3mz is the bottom end (block)? So basicly I could buy a 3.3 block and put my 1mz heads on it and be ready to roll? I'm about to buy another engine to start a performance build for the solara, and this could be another way to go. A supercharged 3.3L 1mz/3mz sounds pretty good!

Although it bolts right up, you have other obstacles to handle, such as finding a solution for the EGR cooler (which has no place on the 3MZ block), plugging up the VVTi oil passages, etc.

[TMMK Toy]

LOL @ Killa Cam. This thread is old as hell. I still got my eight six but haven't really had the funds to do much besides improve some things suspension wise and take care of a few odds and ends. But I think I am gonna keep the car and go for the 1uz later down the line. Hoping one of these job prospects works out for me here in the future