Search results for query: *

I'd like to recommend the Yoshimura Dual Stack (http://shop.yoshimura-jp.com/files/img1/765-T2--0600.jpg), as an intake upgrade. I made my own, but that shows the concept. From my own research & development using the idea, it is possible to have the shortest possible intake runner length, i.e...

Thanks Tugboat, I already have 120hp at the wheel ! Working more on the fact that Honda have not produced a 900-1000cc V4, but I'm convinced that this engine can accommodate the upgrade. It is basically an RC45 engine that in endurance trim made 150hp, in WSB trim made 180-190hp ! so the...

Can't disagree with your quibble the example was pulled for the link I posted, but the effect is the same higher ambient temp will mean high compression temp. If any engine is run to the edge of pre-ignition, then a change in ambient temp may be enough to push it into pre-ignition. As stated...

I think you will notice I did elaborate on the detonation/Compression ignition issue later :) I agree that compressed air fuel mix of gasoline is harder to ignite, but the lower the compression the easier it is to ignite & pre-ignition often happens before high compression is achieved due to...

Thanks Tugboateng, I believe that is where TTS in the UK used to send the VFR blocks to have a big bore fitted. The results of those upgrades were not always successful. Hence I'd rather keep it local if possible. The plasma deposition coating would be ideal, but I can't afford that much for the...

We have the materials, but no one willing to pay for it ! The cost for run of the mill production engine putting out that power would be astronomical. But keep an eye out for "Metal Glass" in the near future, its regular glass but fired by electrical induction & produces a high tensile ceramic...

Well yes, no & no. The wall thickness is 8mm as stock, but the MMC liner is castleated & 2.5mm wall thickness & due to casting movement from a block I cut up, it needs to be bored out to 78mm to clear the MMC fully. That would leave 5mm wall thickness, so possibly enough, possibly not. A...

Solid dowels can transmit power, hollow dowels are only for alignment. The best solution for big torque numbers is a keyed surface plus clamping force. If you don't have the meat in the part to machine a keyed surface, then blind drill & fit captive solid hardened steel dowel pins then clamp...

Hi Jack, Honda did this with the VF1000R motor & the plan would be to copy that method. Bore out the old MMC liner, machine the base such that a stepped press fit to seat the bottom of the new wet liner with one or two O-rings to seal the crankcase from coolant contamination. The flange on...

Thanks dgallup, I know that's an option & is how it is on some engines I have worked on, just looking for the alternatives if there are any.

Good article here that may help;- http://www.superchevy.com/how-to/project-cars/sucp-1204-cooling-system-basics/ But basically you need to know the BTU, which is approx 43BTU per HP. Roughly 1/3 of the heat generated goes to the cooling system in petrol engines, less in diesels, but if you work...

Well a diesel by definition is a detonation engine as it is compression ignited, apart from cold starting. The other issue is diesel fuel is MUCH harder to ignite, just poor some on the ground & try to light it with a match ! Try the same with petrol & you better stand back or get burned with...

The idea of variable compression is great for diesels where the ignition is fixed & thus the revs are limited due to the ignition point being fixed. Varying the compression would allow for the ignition point to be moved & or the you of two stage turbo/superchargers, allowing for more revs which...

I think you will find that the available main bearing area + heat management will be the main issues with this. A 4x power increase is much worse than 4x the load, that said how often does an engine see max power applied ? Likewise power at load is the killer, a max rpm burn in a low gear is...

Hi All, Just read this thread whilst trying to find some info for a project I'm working on. Big Overbore Limitations http://www.eng-tips.com/viewthread.cfm?qid=312712 Same scenario, but with an 800cc V4 motorcycle engine rather than the 400 in the original. Open deck cylinders. I've already...