steve shadows

What are you talking about?

I use PWR or GREDDY IC, only.

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garbury

ive been running 18 psi on a 2871 .86 since August. I drive my car daily, about 150 miles a week and get on it very frequently. I run 91 octane and have all supporting mods including a wideband, stock cams and I just put in RAS. I've got a ROM tune from CG tuning, and he left the timing map pretty safe and I've got 11.6 afrs once its wot.

BTW arent sti injectors kind of small? I'm running 850cc sards, but wouldnt mess with anything lower than the nismo 740s if you want to push the turbo.

Also,

Oneoverwrx

We are on an safc so we cant really play with timing.One change is brian crower 264s were installed. Car was tuned on 17psi and went [email protected] on saturday. It had been some 11.90s but we were running 1.88-1.89 60' times. Finally got a decent launch went a 1.69 and dropped that much off his e.t. Car still has a lot of room for improvement as we plan on turning the boost up and still have to work on the launch. With a 1.5x 60 and some extra boost the car should dip into the 10s.

I do agree that the sti injectors are a little small for what we are doing but we are running 110 oct all the time. The car might get 20 miles a week on it so it isnt a big deal. We will probably go to a bigger injector later.

With the 110 at 17 psi we were safely tuned at about 10.90-11.20 throughout the entire band. SO there is a lot of improvement there as well

usdm180sx

Stop right there. If you are tuning a 2871r for 350+whp with an safc you shouldn't be tuning motors. Get a stand alone, get a tuner who will do it right or don't do it at all and do your friend a BIG favor by saving him the cost of rebuilding a blown motor.

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Oneoverwrx

lol run some similar times and come talk to me.

He has been talking about buying a power fc so we can put a good tune in the car but we are working with what we have and doing really well. The car is on 110 octane and 17-18 psi. Stock timing and 11.0:1 afrs. This motor wont blow up for a long long time at this rate. LOL There is no way it is knocking and it is completely safe.

dynamicck

High boost and drag racing never equal long motor life.

Oneoverwrx

17-18 is high? LOL

I would say a drag car of this caliber and with low timing, low boost, safe afr, high octane would generate a long life of the motor. Now i would say that the driveline might not last long.

I believe he is going to build the motor over the winter and i doubt it will do me any good to ask here since you guys think 18 psi is high boost but....How much boost will a stock block with cp pistons and maybe pauter rods take.VS a sleeved block with same rod and piston setup?

I talked to ron(RAW Performance) formerly axis about an sr20. He told me that the stock block unsleeved was very strong. I would say that the most this car will ever see would be 25psi on something like a 30r. Probably make in the 550-600 range if we decide to push it a little or go with a 35r.

Are there people on stock sleeves making 500+ or do they need to have sleeves to make good power?

dynamicck

Sorry I thought you meant 17-18 on pump and 23-24 on 110. I got your previous post and original post mixed up.

You dont need to sleeve it to make 500hp. It's been done w/o resleeving.

golfer17

I've ran anywhere from 12-20psi (I change the boost often so I don't get tired of it) on a stock longblock sr20 now for almost two years, and consistent 17psi for the last month with my 2871r, self-tuned with only an safc (with 480 injectors though I don't have to correct as much), and the car still runs as strong as it did whenever i first put the engine in. However, I check my wideband every day, the first time i get on it to make sure my afr's are good, and I rarely run more than 15psi on pump gas (I run an e85 mix now). so yeah, I think 350-400whp should be safe on stock internals as long as you have a good tune, check the afr's often, and always add a good safety factor with race gas when running more boost.

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Oneoverwrx

car is on race gas only for the rest of its life as i have said. The car is only driven about 15-20 miles per week and we have 110 on pump about 1 mile from the house. Also as i have said the afrs are very safe in the low 11s on 110 oct and the boost at a low 17 psi for 110 oct gas.

Last weekend we took the car to a midnight mayhem event at a local track and the weather was great for a turbo car it was getting in the low 60s and the car was loving it. This track however doesnt hook nearly as well as the track the car was previously at but the weather was better and here are the results. Car went an 11.39 at 125 mph on a 1.83 60ft. Assuming we can get the car hooking better with a little suspension tuning the car will go in the 10s. With the little that is dont to this car it makes me wish i had one. If the car had 60d like it had the previous week you would be looking at an 11.10-20 car and i am almost positive we can make it go in the low 1.6s and maybe high 1.5s. This in itself would probably result in a 10sec pass and if not we still have plenty of room to make more power. Probably could lean it out a full point or turn the boost up to about 20-21 and go from there.


How fast has anyone ever been on a stock sr20 with cams only?

golfer17

wow, awesome time! 125mph on 17psi sounds really fast (i'm only hoping for mid-teens from mine). what's the setup like to get it that fast? (weight, other power mods, suspension setup, etc)

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Oneoverwrx

Car weight is about 2400 without driver and with 1/2 tank of gas. It is a s13 hatch car.S13 black top, BC 264 cams, 2871 with .86 ar, apex i intake, megan racing tubular manifold, Circuit sports downpipe, buddy club exhaust, Hybrid FMIC with hks ssqv. Car is of course tuned with an safc2. Car is on sti injectors and walbro 255 fuel pump. He has a nismo fpr but havent installed it yet. Car was on M/T et drag slicks 26x8.5x15 tires. Has JIC coilovers but need rebuilt. Car has a welded rear diff and stock axels.

that is about it i think.

The key with doing well at the track is traction. If you can make a car hook it will do better than if you just make gobs of power. I definately think a car with a t25 and cams could run some low low 12s maybe get into the 11s with a tire and some driving.

steve shadows

if you want to run 10s just get a standlone re-tune and you will find another 30 whp or more lurking and the car will run better in every part of the map and also cooler

it's like beating off with jam instead of baby oil, why?I did 11.8 @ 121 mph with stock sr with stock cams (100% stock long block and stock im with afc and tuned rom)

But I hated the way it drove, Since using haltech the car makes more power at 12.5 psi with a gt30 r than it did with the other setup at 26 psi with a 62-1/t3 turbo, it's cooler, more efficient and has lasted at over 400-450 whp levels as a weekend and track car for more than 2 years now.

Still using stock bottom end. When I was using the afcs I would fry pistons every 4 drag comps.
Only thing diff is IM and Cams + Haltech

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Oneoverwrx

well an ecu is definately in the cards but just not in the budget right now. Would like to get a intake mani on the car as well.

Oneoverwrx

well guys we went back to the track on friday night. The air was a little cooler but we left the exhaust on the car(not thinking about it). We added a little weight to the trunk(50-75lbs) car went a 1.59 60' went 7.11 in the 1/8th and a 11.15 in the 1/4. It went 97 in the 1/8th but only went 123 in the 1/4. I think the exhaust made a little difference and i think the shift to 4th was a little slow. But this was still on 17psi and mid-low 11 afrs. We need a camber kit and a little more time to test so we can get the car to leave straight and we will dip into the 10s. I have a video of the 11.15 that i will post later.

steve shadows

congrats on the time. I think I'm going to head back to strip in August looking for a sure 11 too

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Oneoverwrx

here is the video. We added a little weight as i said and the car left fairly good, we just need that camber kit and im sure it will go in the low 1.5s. Next time to the track will be 10s or bust!!!

[ame]http://www.youtube.com/watch?v=FweEsmx9uXw[/ame]

golfer17

When I first saw this post, I was about to try and argue in favor of a tuned rom with safc, however now that I have a mail order tune loaded onto my computer and have compared it with the stock map, I understand why a standalone can be so much better than a mail order tune/safc (though I think I would still prefer tuning the stock ecu in real-time with something like nistune for my purposes).

You have me a little worried though now about frying pistons with the safc. How much fuel were you having to take out/add in at the top end? I’ve ran my car over a year with just the safc pulling out a max of about 20% fuel and boost levels from 12-20psi, and now that I have a mail order tune on it that I was hoping would get things a little more accurate and to where I don’t have to take out fuel, I’m actually adding in 20% fuel and it’s worrying me a little bit. Even though I’ve checked the timing map and the values seem to be decreased slightly from stock, it’s just really been worrying me that now that I’m adding in fuel instead of taking it out, I’m now in a completely different place in my timing map than I was before.

very impressive. I'm still too afraid of breaking my axles or tranny output shaft or clutch or something to bolt on my buddy's slicks and see if I can't hit 11's.

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idahotuner

oneoverwrx did you check out my thread i posted today? here is a link#/f/showthread.php?t=202951

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Z U L8R

11.0's are safe air fuels but i'd still back the base timing down 2 degrees and keep it right under 12's with a little extra fuel up top if it were my/customer's car. congrats on the good times tho and i hope to see the 10 sec pass on vid. good stuff, keep it comin brotha

Dave @ Lethal Injection Motorsports =]

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Oneoverwrx

i just checked your thread idaho...nice numbers. I would love to dyno tune this car. We were thinking about doing a tuned ecu and then tuning on it more with the safc.

Im sure there is more left in our car as it is safe everywhere it can be. As i said it will hit 10s next time at the track and i will have video for you guys. Thanks for the support.

Oneoverwrx

ok guys....we tried tuning for 20psi but ran out of injector. The 110 helped us stretch the 550s pretty far but about 17-18 psi is all on 110 octane fuel. We may try some c16 but i dont know. We did get the car aligned so it should leave straight.

Erjay1

Any updates? Did you hit 10's? Did the motor hold up?