I'm not even that concerned with the drifting... I'm just doing research for what kind of power can be sqeezed out of this engine. I want to hit 550whp and don't know if this is the engine for me or not. I'm not so concerned with money either, since this project is still in the planning phase so compession problems can find solutions later. I'm converting a 3rd gen Prelude to RWD and was hoping to go all Honda (ie the F20C) but I want to make sure it's a possiblity. This engine is notorious for being a bitch to tune, but I want to give her a fair chance. 250hp stock is amazing for an NA four-banger, so I can only imagine what some time, money and a VGT could do to her... Perhaps you guys can imagine this as well? I'm definately going to use the double-wishbone suspension under the lude Sweet! It seems to be totally possible to fab mounts for them to fit on the lude! Just money, of course... Some day soon! One step at a time, I'll get there.

 

PS Does anyone know a company or site that sells aftermarket VGT's? Or at least gives me some spec on the min/max levels of psi provided? Oh yeah, and pricing too.

 

I wasn't aware this was for an engine swap, good luck.

maybe you can take the VGT off of the RDX and slap it on

 

I thought of that as well, but it only pushes 13 psi at the full-boost position, and if I'm gonna have the head strengthened to hold boost, by God if it doesn't hold some BOOST! I'm thinking BorgWarner, if I can, but I don't think they sell to individuals.

So, how much torque would a 2.5 stoker kit and the new gears give you? This is the whole reason for the thread: numbers. You have to admit, 163 ft. lbs. isn't much for a 250 hp car. I'm satisfied that this would expand the powerband enough, but still unsure of the hp/tq concerns.

I went through a stage where I was looking at v-6's as an alternative. They're cheaper, easier to tune, easier to mod, and easier to fit in my engine bay, but there's something about the F20C that calls to me... I am drawn to it because I beleive that if money was no object, you could get some insane juice from her. So I'm back on my F20C kick and I need the info.

Is there anything else that is keeping you from boosting this engine other than the concern of overhaeting the head due to compression ratio? Cause you could have the head treated or even replace it with a custom one. You could just make it stronger, or drop the compression lower, but is the stock engine otherwise capable of holding boost? Or would it have to be sleeved?

 

i don't know anything about aftermarket gears for the prelude. i was speaking of gears for the S2k.

y don't you just slap an InlinePRO turbo on it and crank up the boost? the pistons and rods are already forged, so all you need is a 3mm head gasket, dual valve springs, titanium retainers, and injectors. InlinePRO hit 565hp with this combination and their off-the-shelf turbo kit.

are you sure you want to swap this into a prelude? besides the balance and handling issues you're going to have with a longitudinally situated engine, are you sure this is just a swap out, swap in operation? and after you squeeze this engine in there, are you sure a turbo kit made specifically for the architecture of the S2000 will fit too? or do you plan on assembling your own turbo kit? essentially you are trying to turn one car into another. ever considered the K-series? they can push some serious numbers too and will save you loads of $$$.

 

buy a 911 turbo!

 

[QUOTE=P2K,Sep 25 2006, 12:27 PM] So, how much torque would a 2.5 stoker kit and the new gears give you?

 

 

It's not going to be a FWD car... I'm buying the F20C with its six-speed RWD tranny for a RWD conversion. And I don't mean to dis the s2k... I love the car and the engine or I would even be doing this. I'm not even saying that its got inadequate torque or inadequate anything for that matter. This car rocks. I'm just saying that it could be even better with some more torque and horsepower.

As far as the 911 VGT, it is made by BorgWarner but I can't find any specs on its range of psi provided, so I don't even know if it would work well. The point of VGT is to eliminate turbo lag, but if the lowest psi provided is designed to spool instantly on a higher displacement 6-cylinder twin-turbo, perhaps the min boost is still too high to spool quickly on a lower displacement I-4. I'm not shooting it down, as I said before I've thought of it myself. I just can't find the info. If you know it or can link me to it, then I'd be very grateful and will be well enough informed to either ditch it or drool over it till I get the $.

Now, anybody got any numbers? I've been doing some research but I can't any approximations on the increases due to these mods. Also, you guys have mentioned both InlinePro and Toda stroker kits and I've got some more questions after my visits to their respective websites... I noticed that the Toda is for a 2.4 with higher compression and the InlinePro is for a 2.5 with compression running only slightly higher. This means that the Inline would probably be better for FI, right? And it has an extra .1L, right? So why is it half the price? Does it suck? I can't imagine that it would or you wouldn't have mentioned it, so I thought maybe you could enlighten me.

 

InlinePRO specializes in Hondas, Toda does not. InlinePRO is local, Toda is not. Toda is a huge brand name, InlinePRO is not. Therefore it costs InlinePRO significantly less to deliver the same product, and they demand less profit to have their logo printed on the block.