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Re: Make slowboy not so slow
I agree, I expected something like 170s for compression.
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Re: Make slowboy not so slow
No offense, but i think your engine is no better than the turbo.
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Re: Make slowboy not so slow
Some food for thought, another thing you could try is to hook up the boost leak tester to the TB Elbow. See if it still leaks out of the VC/dipstick. If it does, then you know it's not the turbo. If it doesn't, good chance it is. Just help verify that it is in fact the turbo.
I also agree those compression numbers are a bit low, but I've definitely seen worse. |
Re: Make slowboy not so slow
At least they're pretty even.
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Re: Make slowboy not so slow
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Re: Make slowboy not so slow
Guys, don't forget that compression numbers depend on the tester equipment used. I don't use my compression tester super often, perhaps it reads 10psi low from some other one. 160 would be a much better number, and it is common for them to vary from gauge to gauge. The fact that they are all fairly consistent, that is what is important.
The turbo is definitely shot, the compressor and turbine wheels are chewed up, and there has to be air seeping past the bearings. What's this red you got andrew, a new one or another pos used one? ;) |
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His numbers are all even, and that's what I think is real important. The readings sometimes vary from gauge to gauge. I agree his numbers seem low, but could be worse. |
Re: Make slowboy not so slow
Yea its good they are even, and gauges could be inaccurate, but considering stock 2G's typically have around 180 compression, and his motor should at that or even more since its 9:1 compression. Maybe 2.3L is making the difference? I dont know. My old 1g with 7.8:1 compression had about 150 across the board, so it just seems like his is quite low. Lots of boost will have to make up for it I guess.
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Re: Make slowboy not so slow
I'm already up to like 6k on the motor, damn trips to Iowa. Anyway, I'll check with my compression tester as well, also when I get a good starter. That way I can compare to my previous results with my stock motor.
And Brandon, yes I thought of the same thing, when I have the turbo off i'll hook up the boost tester to the lower IC pipe and go from there. EDIT: won't a compression test show lower numbers with big cams? |
Re: Make slowboy not so slow
No, the valves fully open and close no matter what cams you have :)
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Re: Make slowboy not so slow
Well I thought since it was super low rpm range it would make less compression than a stock cam, but I'm just a noob.
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Re: Make slowboy not so slow
Also, Correct me if I'm wrong, but compression ratio doesn't have much of an effect on compression psi. Higher compression pistons don't really pull any more or less air than stock pistons
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Re: Make slowboy not so slow
No im pretty sure the higher compression pistons you have, the more pressure there is in the cylinders. Thats why 2gs register much higher than 1gs.
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Re: Make slowboy not so slow
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Re: Make slowboy not so slow
ok, I just wasnt sure, I know it compresses the air to a smaller space, but there's actually less volume for the air to fill at BDC, so I thought maybe they would cancel eachother out.
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Re: Make slowboy not so slow
I finally got my starter replaced, works like a charm now, thanks Mark for the JDM starter!
I have also been running e85 for a couple weeks now, and the mileage is better than I expected. I'm getting around 18 in town and 21 on the highway. On my trip to Iowa this weekend I averaged a little under 20mpg, and that's with a little town driving, idling for an hour, and hauling a longblock as well (which I definitely noticed, a lot less vacuum than usual on the highway). It costs $2.85 everywhere in Iowa that I've seen, downtown Minneapolis it's like $3.25, I need to find a cheaper local station that sells it. Since I have a 16 gallon tank, I can easily go mid 200s on a tank. I hear most people have to add like 35% more fuel or so, but I had to add almost 45% to get the fuel trims back to zero. The mileage isn't that bad so I can't complain too much, just wondering why this may be? |
Re: Make slowboy not so slow
I need to get on that e85 bus. Sounds awesome.
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Re: Make slowboy not so slow
Oh yea, and that longblock messed up the tint on my hatch glass, scraped off about a quarter size area in one spot and a few other scratches too, I was sort of pissed.
Anyone have an engine hoist I could use for about 2 weeks? I need to get the long block out of my car and into the black GSX in Pete's garage so I can sell the bitch. |
Re: Make slowboy not so slow
Mine is at my buddies in Maple Grove. If he's done with it, you could go pick it up from his place. Pete lives in MG too right?
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Re: Make slowboy not so slow
Perfect, is that Derek? Can you pm me his #?
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Re: Make slowboy not so slow
Nah it's my buddy Austin. I'll call and ask him if he's done with it. If he is, I'll get you in touch with him.
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Re: Make slowboy not so slow
Brandon, I'm almost done with the hoist, I could probably drop it off next week or so.
A few updates, I got the motor and tranny all out of the black gsx parts car, and swapped the good tranny into my talon. Now that I've used all the parts I want off the gsx, it's time to put it back together. Last night Mark and I took apart the bad motor from the gsx, it was pretty interesting, first time seeing a motor apart like that. The one rod that broke through the block was U shaped, it froze the crank and we couldn't get either out of the block (I'll snap a pic tonight). Fortunately the trasmission wasn't hurt in the whole ordeal. We also got the head off my original motor from the talon that I thought blew a headgasket. However, we couldn't see anywhere that it looked bad, so now I have no idea why the car overheated in less than 5 minutes. It was blowing out a lot of smoke from the tailpipe with any boost at all, would it be possible to not see where it was blown on the gasket? Compression wasn't bad either on the motor. Anyway, tonight we'll probably get the good block and good head all put together and get the belts all set. Haven't decided about hooking up AC yet, does anyone know what type of freon the 95 uses? Can I buy a cheap recharge bottle just to get it working for the sale? |
Re: Make slowboy not so slow
From 1995 onward they started using the R-134 refidgerant. So as long as the system doesnt have any leaks, you can just get those recharge kits to refill the system.
Good to see everything coming together! |
Re: Make slowboy not so slow
the only thing you can legally buy without the proper papers is r-134
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Re: Make slowboy not so slow
Sweet. I'll probably spend the extra minutes to hook up the AC piping then and recharge it after the car is working.
Any ideas on what else could have caused the overheating? I checked out the water pump tonight and it's crusty on the outside but looks mint inside. I still swapped it out for the known good one but probably didn't matter. Anyway I'll probably have it put together by the end of the weekend, head and block are all cleaned up and ready to put back together. |
Re: Make slowboy not so slow
You replaced the water pump with a used one?.. Where did you take the block to deck it, and to machine the head? Or did it not need that, im assuming it wasnt warped.
Not sure what could have caused the overheating. Either water pump seized/broke, not enough coolant, blockage in the radiator or piping, or maybe the thermostat was stuck. |
Re: Make slowboy not so slow
The water pump off the gsx looked almost new, I think he said there was less than a couple thousand miles after all the timing and water pump stuff was replaced. And the gsx head shouldn't have been warped, the only thing wrong was the rod broke, head was still in great shape.
The overheating happened after the first 1st gear pull I did with the 20g and it spiked to like 24psi so I'm pretty sure it was just the headgasket, pretty big coincidence something else happened at that exact time. Guess I'll find out this weekend. |
Re: Make slowboy not so slow
Ah, finally tuned. :)
Big thanks to Shane (ecoli), especially for dealing with all the issues that came up throughout the day. Did a third gear pull just before coming into downtown (only place without traffic on drive home), car feels awesome. Feels like my t28 did in 2nd gear, can't wait for an opportunity to do a 2nd through 4th pull. I've nearly maxed out my boost gauge, 28psi falling to 26 by redline. In third gear it doesn't hit peak boost until after 4k rpms, but in 5th it's a lot sooner. |
Re: Make slowboy not so slow
Dyno graphs or ban!
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Re: Make slowboy not so slow
LOL @ "Feels like my t28 did in 2nd gear,"
.....it better feel like a lot more than that! |
Re: Make slowboy not so slow
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I meant the rate of acceleration, t28 in 2nd felt like it does now in 3rd, thats a pretty huge change. I guess I can post a graph, just for you Scheides.
Shane had it to something like 405 a few times, but I think he said he backed off the timing a little for a safer tune. Seems to be a pretty healthy powerband, I'm very pleased with the results, now I have to not touch anything in order to have a direct comparison to DynoJet on the 27th. |
Re: Make slowboy not so slow
Nice numbers!
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Re: Make slowboy not so slow
Sorry, I'm just excited, I can't even remember how many boost leak tests we've done on that car :) Awesome. Torque is pretty late for a 2.3 IMHO, but makes damn good power up top! Gonna keep her together now?
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Re: Make slowboy not so slow
Glad the thing is actually working well now!
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Re: Make slowboy not so slow
Nice going man, i haven't seen you since teh days of applebees be nice to see the car again.
Power looks awesome, can i get a ride? |
Re: Make slowboy not so slow
Great numbers Andrew. My connection sucks here, but what turbo are you running now a days?
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Re: Make slowboy not so slow
Yea I guess I should post major mods now that the car is mainly "complete".
2.3 liter FP red turbo (60-1 size) FP4r cams JMF intake I'm happy with the numbers, torque is lower than I expected but no big deal. I wonder how close I am to maxing out the turbo, not sure what max boost could be on a stroker. |
Re: Make slowboy not so slow
Congrats! Those are nice numbers. Now get out and enjoy that thing before the snow flies!!
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Re: Make slowboy not so slow
Nice numbers.
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Re: Make slowboy not so slow
good work slowboy! the title of thread "make slowboy not so slow" is exactly what you did
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