Search results

Well, if they are keeping the same 6700-rpm rev limit as the older engines, then they can afford to lose a bit of rod/stroke ratio and up the stroke a bit. :) That, and I'm sure they probably pushed the bore out even more. Looks very interesting; I love the idea, but I'm not sold yet on the...

You mean W8, not W10, right? I can't see how a W10 would work... :p

I'm not sure the port finish would affect turbulence. Let me explain before I draw fire from a few people. This is based off my limited understanding of fluid dynamics. Obviously, a smooth port wall will create more of a "laminar" flow versus a rough wall. The rough wall will be more...

Wow, that is quite a polish.

I'm very interested to see how your S13 turns out. As far as fuel delivery, if you use some sort of unit to augment the stock ECU, I think you could get away with it, but like Lextreme said, you can't do it safely with just the stock ECU.

I mentioned this before in another thread, but as a minor comment. I'd like to get some input about this. Can we rotate one of the cams so that the scissor gear on, say, the exhaust cam is retarded or advanced a tooth? This would allow us to play with cam overlap. Also, if we added adjustable...

If you can get the MW mixture to evaporate during the compression of the air (ie pre-compressor on a turbo setup), the compression becomes "quasi-isothermal" and almost eliminates the need for any intercooler. That is, the amount of temperature increase due to compression of the air is greatly...

By hump, you mean the port should converge a little bit towards the end to increase velocity? Kind of like a venturi? I also agree that taking less material out is better than too much. I've seen some quite amazing gains on certain engines with just porting casting imperfections and working...

Thanks for the explanation of intake phase. I have one question concerning the port sizing: with regards to % of the valve size, I'm assuming you mean both intake valves in a 4-valve head? Any input on exhaust ports for naturally-aspirated applications? I know on turbo setups, everyone I've...

Can you take a picture?

In my experience, more lift and duration will help overcome smaller runner diameters in a FI setup. But I also agree that big runners still work well with FI. They don't seem to add as much as cams though.

Why do we need 2 MSD's anyway? Can't we use one to run a wastespark setup?

Ah, okay. Based off the 1UZ block vs. 3UZ block, I was thinking it was constant all the way down.

What are piston-guided rods vs. crank-guided rods?

The video said they were 4480cc.

I think you're missing the point of an MSD. Not only will it allow your EMS to control timing (assuming you're switching to a DIS setup), but it'll also produce a better spark.

I understand that, but my understanding of it was that the sleeves were the same thickness. Bigger bore, but same thickness. I got this impression from the 1UZ Block vs. 3UZ Block page. In fact, it even has measurements for both sleeves at .187", or a little more than 4.7mm (which is about...

I know they are longer. The rod journal is smaller so they will fit with an offset crank grind and moving the wrist pin up. I just want to make sure the width is correct. If that is the case then I can get a cheap set of rods that don't have to be modified!

Okay, back to the Nascar rod idea. I can get the bore and R/S ratio that I want with these and they are MUCH cheaper. Will these rods work? The large end it says is .880", whereas the stock rod is .904", correct? I assume .02" would be off too far.

Yeah. If I can order them straight from Pauter for the same price, then I might as well just have them make them with the journal width that I need. But otherwise I'll just get a machine shop to make them thinner. Are my numbers on the sleeve size of the 1UZ correct? I thought the 3UZ and...