My new 1993 Del Sol Si...BUILD THREAD...LS/vtec with custom turbo setup

[vtecnitrocrx]

Originally Posted by GA TEG

Kick ass build. I just found a del sol like yours(partially complete) and am thinking about going with a stock B20 on 10psi. Should be good for 250whp if I am lucky.

Great job!

I built a setup for a stock B20 last year and the guy made 292whp on a 57trim to4e at 11psi. Tune for around a 11.5:1 until the torque peak, then start to pull fuel slightly. Be conservative with the ignition timing, and that's all you need. B20's can survive more than people give them credit for, you just need to be a little more careful.

To those asking about E85, E85's "stoich" ratio is in the high 9:1's versus gasolines 14.7:1 stoich ratio. Since typical FI setups are tuned for 11.5-12:1 for the street, it reveals that you need a fuel system capable of flowing 35% or so more fuel for the same power level. So, while walbro 255's may not be maxed until the 600's hp wise, 475 or so is pushing the pump on E85. You need at least a 660 injector to hit 350whp on E85 as well.

So don't be deceived into believing you can just stick E85 and "hit a button" because you can't. E85 burns alot cooler than gasoline, therefore you'll see alot of variation in ignition timing curves versus standard gasoline. You need to be tuned specifically for E85. E85 has a 105 octane rating though, so you can get some really solid, safe power out of motor running it.

E85 is really a "race gas" for the street in some ways. Only problem is just the shear volume that you'll use, so gas mileage sucks. If you look into the BTU (British Thermal Units) output of gasoline versus E85 (85% Ethanol, 15% gasoline) then you see there is a large variation. It simply takes more E85 fuel to create the same heat energy as gasoline at any given point.

[GA TEG]

I want to make b20 as durable as possible so what would I need? Block guard? Different Springs and Valves?

That del sol fell through so now I am looking for a EK Hatchback.

Kev

[NegroDamus]

Originally Posted by vtecnitrocrx

To those asking about E85, E85's "stoich" ratio is in the high 9:1's versus gasolines 14.7:1 stoich ratio. Since typical FI setups are tuned for 11.5-12:1 for the street, it reveals that you need a fuel system capable of flowing 35% or so more fuel for the same power level. So, while walbro 255's may not be maxed until the 600's hp wise, 475 or so is pushing the pump on E85. You need at least a 660 injector to hit 350whp on E85 as well.

So don't be deceived into believing you can just stick E85 and "hit a button" because you can't. E85 burns alot cooler than gasoline, therefore you'll see alot of variation in ignition timing curves versus standard gasoline. You need to be tuned specifically for E85. E85 has a 105 octane rating though, so you can get some really solid, safe power out of motor running it.

E85 is really a "race gas" for the street in some ways. Only problem is just the shear volume that you'll use, so gas mileage sucks. If you look into the BTU (British Thermal Units) output of gasoline versus E85 (85% Ethanol, 15% gasoline) then you see there is a large variation. It simply takes more E85 fuel to create the same heat energy as gasoline at any given point.

Interesting. I won't bother then, I'll be able to hit my goals on pump gas anyway.

[vtecnitrocrx]

Originally Posted by GA TEG

I want to make b20 as durable as possible so what would I need? Block guard? Different Springs and Valves?

That del sol fell through so now I am looking for a EK Hatchback.

Kev

It simply depends on your goals. True bullet proofing will come with aftermarket sleeves, along with rods and pistons. It really comes down to what your after, and to how well it's tuned.

Stock sleeves on the B20's are, without a doubt, weaker than the 1.8 blocks sleeves. They do have some strength though, and when the rev's are kept reasonable and the cylinder pressures are reasonable, it'll last.

For a turbo setup approaching 300whp, a stock motor can and has done it many times. Just use a solid management system and have a professional tuner tune it...you won't have an issue.

As far as the head goes, the head will take more than the stock block can.

Absolutely stay away from block guards! They create higher temperatures right at the top of the bore and will lead to problems. If you want cylinder stability look into posting your block. Check out www.theoldone.com for the block posts which any machine shop can install for you.

Negrodamus: Yeah, if regular gasoline can carry you, then stick with it. E85 is still only available here and there anyway. Like I said, if you start pushing the knock limit of gasoline, E85 can help you and serve as a race gas for the street, but until that need arises stick with high octane gasoline.

[IISaiNtII]

excellent build.

wish i had the know-how, tools, and experience to do 1/2 of what you're doing here... for me, i can just assmeble and install.

good stuff though, mani looks awesome. how much you charge to make one?

[vtecnitrocrx]

Hey, thanks for the comments man...I've worked hard over the years.

The manifold's of that style start at 400 bucks, and go up depending on what options are chosen all for sale through my website (which I don't post because I'm not a sponsor here). Full backpurged, ext wastegate mani's in 316 stainless is about as high quality a manifold that you can buy and I sell those for mid 500's. Pretty good compared to full race which is over a grand.

My primary business is doing custom setups, manifolds, tuning, and ecu's. I do several engine builds a year, some head porting, and some custom carbon parts on a very sporatic basis. Not bad for a business from home. It's full time and pays my bills easily. Looking for some commercial space here soon to give my second run at business, having learned alot from my first failure which lasted about 2.5 years or so.

[IISaiNtII]

Originally Posted by vtecnitrocrx

Hey, thanks for the comments man...I've worked hard over the years.

The manifold's of that style start at 400 bucks, and go up depending on what options are chosen all for sale through my website (which I don't post because I'm not a sponsor here). Full backpurged, ext wastegate mani's in 316 stainless is about as high quality a manifold that you can buy and I sell those for mid 500's. Pretty good compared to full race which is over a grand.

My primary business is doing custom setups, manifolds, tuning, and ecu's. I do several engine builds a year, some head porting, and some custom carbon parts on a very sporatic basis. Not bad for a business from home. It's full time and pays my bills easily. Looking for some commercial space here soon to give my second run at business, having learned alot from my first failure which lasted about 2.5 years or so.

mind pm'ing me your website?

[projecthatch92]

those are some bad ass welds man, keep up the good work

[vtecnitrocrx]

Well, it's been a while since I updated. I've been BUSY AS HELL with other cars and manifolds. I haven't really put the time to my own car...what else is new. Well, the deal is, if all goes well I think this stuff is firin up on Thur! I have MINIMAL stuff left over (resistor box wiring, valve colver gasket, fluids, boost gauge, some vac line, dizzy and wires, front bumper fit and lip, and ahh that's about it). I just need to make the basemap in CROME Pro to idle on my 880's, then start breakin this thing in.

I've got full build footage, so I'm gonna make a vid for the entire thing, including street tuning, highway rippin...everything.

[vtecnitrocrx]

Originally Posted by projecthatch92

those are some bad ass welds man, keep up the good work

Thanks bro

[macneilsoberide]

Cant wait for the video

[dom yo]

cant wait to see the vids

[IISaiNtII]

Originally Posted by IISaiNtII

mind pm'ing me your website?

i guess so :