Don Terrill’s Speed-Talk

jet1 wrote: ↑Thu Nov 02, 2017 3:56 pm I think it will boil down to cost and availability. The Coyote motor ya for sure that would be awesome but getting one cheap then doing the mods would start getting me close to the 4 rotor. The Ford mod motor could be a possibility other than they are huge and pretty heavy. The VQ35 looks to be pretty cheap to find and fairly easy to put some good sleeves in to get some displacement plus being compact and light weight looks pretty good. The GM LS 4.8 is the cheapest and I am most familiar with it but without a 4 valve head boost is going to get up stressing the motor more. Not sure if it would live.

DaveMcLain wrote: ↑Thu Nov 02, 2017 4:46 pm

jet1 wrote: ↑Thu Nov 02, 2017 3:56 pm I think it will boil down to cost and availability. The Coyote motor ya for sure that would be awesome but getting one cheap then doing the mods would start getting me close to the 4 rotor. The Ford mod motor could be a possibility other than they are huge and pretty heavy. The VQ35 looks to be pretty cheap to find and fairly easy to put some good sleeves in to get some displacement plus being compact and light weight looks pretty good. The GM LS 4.8 is the cheapest and I am most familiar with it but without a 4 valve head boost is going to get up stressing the motor more. Not sure if it would live.

I'm not sure on the weight of the two cam 4.6 mod engine but the aluminum blocks are pretty light. The packaging is huge that's for sure. Whenever I have one here on the engine stand it seems like there's always somebody asking, "how big of an engine is that?"!!

ptuomov wrote: ↑Thu Nov 02, 2017 1:39 pm

Erland Cox wrote: ↑Thu Nov 02, 2017 1:37 pm 2,8 liter Volvo 4 cylinder 8V.

https://www.youtube.com/watch?v=BknG6yT7cho

3 liter Volvo 16 valve.

https://www.youtube.com/watch?v=cKv6_zPfDkY

Erland

How’d those run at peak power for 45 minutes?

jet1 wrote: ↑Thu Nov 02, 2017 11:59 am The application is extreme endurance. runs at WOT for periods of up to 45 minutes. Cooling and intercooling is not an issue with a constant supply of cold water.
I agree that the rotary probably is pretty expensive and alot of boost would be required to get to 1000 hp. Same with the 2jz. The ls 4.8 interests me the most and parts and pieces are easy to get and are relatively cheap I also looked at the Ford mod motor but the weight starts to add up on them pretty quick. The Nissan engine looked good other than getting parts for it. So I guess I am kinda answering my own question a bit.

Now other than the block and engine covers when using the 4.8 lS what heads would work with such a small bore and displacement? Also when running a pushrod V8 7500 rpm sustained rpm may be a little on the high side. Thoughts?

Erland Cox wrote: ↑Thu Nov 02, 2017 6:41 pm Hot. I asked if it was for drag racing.
Erland

When I built a 99 Cobra engine I had a chance to weigh the parts up on a 400 lbs shipping scale.
Complete 32V heads with cams - 62.5 lbs. each
Short block (aluminum block, crank, rods and pistons) - 154 lbs.
99 Cobra intake with throttle body and fuel rails - 31.5 lbs.
Assembled short block with heads, oil pan, timing cover, water pump and stock flywheel - 369 lbs.
That makes a long block about 400 lbs. without exhaust manifolds.
Alternator - 13.5 lbs.
Power steering pump with pulley - 7 lbs.
A/C compressor - 15 lbs.
Stock flywheel - 21 lbs.

jet1 wrote: ↑Fri Nov 03, 2017 10:44 am Yes it is endurance boat racing using a jet not a prop. WE have had one person run the QC4 mercury racing engine without issues other than the massive weight. Considering that the class it had to go into pitted it against 1800 hp t58 turbines weighing 400 lbs it had an uphill climb.