dyno'd my brand new vette motor

[C4_crusin]

well today we dyno'd my 383stroked procharged C4....it wasn't as good as i thought it was going to be...but the motor has been started up a hand full of times and this was really its first test...with all the timing and spark removed it made a decent 400hp w 4psi of boost with the boost falling off at 5,500rpm (most likely belt slippage) on pump gas...final boost it going to be 12psi so we have got a ton of hp still to make its an automatic so the numbers aren't the great but it is still a tire spinning monster


p.s. i video'd it but somthing is wrong with my camera and (not to sure what) it wont play back on its little screen. its just a blank blue screen (with a used tape i havnt changed it recently i know there is stuff on it) any suggestions beside hurl off the skyway bridge?

[Country Boy]

Thats not bad at all for a new motor and an auto! Get some miles on her and she'll loosen up! (sounds like a woman :lol: )

[C4_crusin]

the motor has less then 200miles on it.
it sounds real tight and we put a plug out on the second pull

[obituary]

Thats not bad at all for a new motor and an auto! Get some miles on her and she'll loosen up! (sounds like a woman :lol: )

yeah (break in ) new moter still tight ;)

[C4_crusin]

well i found out today that the blower out of the box is supposed to make 8psi
our is making 4psi....so we have a leak somewhere and the boost is falling off at 5,000rpm....its hard to make hp when you have a motor built for a blower and it aint working together yet.

[Just Dave]

The blower is designed to make 8psi on a stockish motor. A bigger motor with high flowing heads, intake, and headers will lower that number. You should be able to hear a boost leak on the dyno.

[C4_crusin]

The blower is designed to make 8psi on a stockish motor. A bigger motor with high flowing heads, intake, and headers will lower that number. You should be able to hear a boost leak on the dyno.

we'll see, you really cant hear anything, you hear the blower for like 2,000rpm then it gets lost in the exhaust note....
but why is boost falling off at 5,000rpm my redline (rightnow) in 6,300?..we checked the belt it didnt leave any black residue on/near the pully.

its frustratin when you first get everything together and you have problems but you cant find them right away. :(

[NothingFast]

Im glad the car is almost done( it's been "almost done" for like 1 1/2 years now lol) call me when you pick it up and well go put some miles on the baby, aslong as your fuel gauge is working, you know what happened the last time we took it out :lol:.
p.s. well just see how you do against the Dart, if Im not too scared to run you :jerkoff:

[C4_crusin]

Im glad the car is almost done( it's been "almost done" for like 1 1/2 years now lol) call me when you pick it up and well go put some miles on the baby, aslong as your fuel gauge is working, you know what happened the last time we took it out :lol:.
p.s. well just see how you do against the Dart, if Im not too scared to run you :jerkoff:
i get to take it home when we find the problem(s) or 2 1/2 weeks until our next dyno tune (aiming for at least 550whp)...still have to get the roll cage and seats in the car as well as the harnesses...

most of that "almost done" has been financial issues so stfu

p.s. how come you didnt list your 240 as one of your cars? is it that embarassing? :lol: :lol: :D :D :P
project SR20 still sitting in your garage....at least i got my motor in the car :P :lol:

[NothingFast]

LOL, yeah the SR20 is still sitting in the garage, Im trying to sell it so its gonna be gone soon enough, Im going back to the original plan.......... supercharge a 4.3L S10. I tried to call you but you didnt answer......... Let me know if you want me to set up a meeting with that guy about the 14b turbo for the 1k. And I know all the reasons for the car being "almost" done........ I lived in the same apartment with you for almost the whole time the beast has been being built.

[???]

what procharger?

and losing boost doesn't sound like belt slip or boost leak to me. I've had both with mine and all it did was make less boost and hold it all the way thru, not lose up top.

[Boostin97SE-R]

LOL, yeah the SR20 is still sitting in the garage, Im trying to sell it so its gonna be gone soon enough, Im going back to the original plan.......... supercharge a 4.3L S10. I tried to call you but you didnt answer......... Let me know if you want me to set up a meeting with that guy about the 14b turbo for the 1k. And I know all the reasons for the car being "almost" done........ I lived in the same apartment with you for almost the whole time the beast has been being built.


not to go off topic but seriously scrap your supercharge a 4.3 s-10 plan especially if you plan on using the powerdyne kit. I've intalled kits on 2 trucks and the best they got was 14.91.. its really not worth it atleast with the pos powerdyne.

[Jordan Y.]

You could eliminate a boost leak by pressurizing your intake with an air compressor.

[C4_crusin]

what procharger?

and losing boost doesn't sound like belt slip or boost leak to me. I've had both with mine and all it did was make less boost and hold it all the way thru, not lose up top.
D-1sc

[C4_crusin]

You could eliminate a boost leak by pressurizing your intake with an air compressor.
we did the soapy water test on all the hoses and clamps....replacing the black hoses with a "better" blue hose... we also have a 2.65 pulley we are waiting to install...if we instal it it voids the blower warranty... we are making sure its not the blower first. we also burt the plug wire boot on #1 cyclinder...

[C4_crusin]

would a 2 1/2 in exhaust restrict too much exiting exhaust?.. maybe it would some how effect the air/fuel ratio? my thinking is we're trying to suck in more air then we can push out and maybe thats why we cant get good boost.. its not falling off down low in the rpm its up high(5,000rpm) where i think the exhaust just cant keep up with the amount of air coming in so we get little/no boost increase?

its just a thought cause at this point i'm running out of things that may be wrong...

we have a custom made 3 1/2 w/ a 5inch X pipe that will be going on this week, along with a cog belt system that will handle 16psi before it slips

[Just Dave]

You're trying to go sub 10's with 2.5" exhaust?

That won't affect your boost. The reason boost is falling off in the upper RPM's is because the blower isn't able to keep up with the air demands of the motor. Its able to at lower RPM's because the air requirements are less at lower boost and lower RPM's. You're simply out of air with that pulley.

[Sneakin Deacon]

well...my biggest question is...why was all the timing taken out?

2nd is, why are you using a cog pulley setup? your going to hate trying to keep it all aligned.

3rd is, cog pulleys dont slip so what is this 16psi slipping thing? if anything they jump teeth and when that happens it usually tosses the belt.

[C4_crusin]

You're trying to go sub 10's with 2.5" exhaust?

That won't affect your boost. The reason boost is falling off in the upper RPM's is because the blower isn't able to keep up with the air demands of the motor. Its able to at lower RPM's because the air requirements are less at lower boost and lower RPM's. You're simply out of air with that pulley.
that was the exhaust system that was on the car before we decided to go crazy....we have a new one its just not on the car

[C4_crusin]

well...my biggest question is...why was all the timing taken out?

2nd is, why are you using a cog pulley setup? your going to hate trying to keep it all aligned.

3rd is, cog pulleys dont slip so what is this 16psi slipping thing? if anything they jump teeth and when that happens it usually tosses the belt.

1.why they took the timing out is out of my hands...maybe to protect the motor it has literally 150miles on it and maybe 20miles with the 42lb injectors

2. well the cog belt i believe is going to be better for our set up, we're aiming for 12-14 psi and procharger told us that thier belt will most likely not handle our demands, this car is just as much street as it is race it needs to be as trouble free as it can.

3. as for tossing the belt, shit happens i cant predict that it will toss it but i know the original belt will not do

[Sneakin Deacon]

better go get a cog water pump pulley too

[C4_crusin]

better go get a cog water pump pulley too
it came together as a conversion kit

[Sneakin Deacon]

well i made 400rwhp through a 9" and slicks on a stock 350 LT1 and a S-trim on 5-6psi running 24*. probably around 430 with street tires and a 10 bolt, if that helps you guage it any. there is no reason for a cog. a 8 rib pulley slips very little even when i decided to try 15psi

[C4_crusin]

well i made 400rwhp through a 9" and slicks on a stock 350 LT1 and a S-trim on 5-6psi running 24*. probably around 430 with street tires and a 10 bolt, if that helps you guage it any. there is no reason for a cog. a 8 rib pulley slips very little even when i decided to try 15psi
lol its going on a 383 purpose built for a blower with a 9'' dana 44 rear (plus i have a little bottle)

[Sneakin Deacon]

i was just stating what a smaller motor, with smaller blower and less airflow did through a heavy drivetrain, stock cast manifolds and 2.25" Y pipe. kinda to move you to figure out why your "purpose built 383" is not running too up to snuff. sure you can bandaid it with more boost and a little bottle, but your underlying issue will still remain.

[C4_crusin]

i was just stating what a smaller motor, with smaller blower and less airflow did through a heavy drivetrain, stock cast manifolds and 2.25" Y pipe. kinda to move you to figure out why your "purpose built 383" is not running too up to snuff. sure you can bandaid it with more boost and a little bottle, but your underlying issue will still remain.
we found out what else was broke... a plastic surge valve (mostlikely the boost problem)
and cracked the top of the intercooler...

the motor is state of the art i've had the heads flowed by the best people avaible and the block was built and machined buy some of the best people in the area... it was dyno'd on an engine dyno and made a little over 500hp at the crank(no blower)...the reason the numbers are not as good as they should be i cant answer, i know we copied exactly a persons car (not saying who) and it made 860whp(no spray) after a year of tuning, now last week was the first time the car had been 90% complete and we attempted to tune it (26 degrees of timing and we're aiming for 40).

to be honest the car made more then 400hp i was low ballin it. not trying to gain too much attention i'm trying to keep the car under the radar...just sitting there you would think anything of it, once you hear the loudest fuel pump in the would come on and the motor fire up... you know its not stock..
i'm still workin on getting my camera working then i'll post up the video


the motor has beed started 7 times since we installed the 42lb injectors and the refitted fuel rail. 4 of those 7 times were on the dyno... all 7 were on the same day...it made a bit shy of 500whp(not trying to brag, i've kept this project quiet for a long time)

[Sneakin Deacon]

you make this like a damn math word problem...i have to sift through the useless info to figure out what your trying to ask.

800hp isnt going to get you any attention. there are cars around here that will walk around you all day. its a respectable number, but you wont be top dog.

[C4_crusin]

you make this like a damn math word problem...i have to sift through the useless info to figure out what your trying to ask.

800hp isnt going to get you any attention. there are cars around here that will walk around you all day. its a respectable number, but you wont be top dog.
we will see, you can have all the hp in the world but if you cant get it to the ground then its useless

[NothingFast]

It's great to finally have the beast back and 20 to 90+ w/no traction was fun today, Banana= your car, similey face=you tires :banana:

[C4_crusin]

It's great to finally have the beast back and 20 to 90+ w/no traction was fun today, Banana= your car, similey face=you tires :banana:
hahahahahaha

[SickVette]

Did Pro Charger really tell you that if you change the pulley it will void the warranty? I find that hard to believe since I have seen nearly every possible pulley option available on everything from a P1 to a F2. On the other hand how many broken Pro Charger units have you seen? I can not recall any.

Have you thought about alchol injection?

[Razor]

Careful on that tuneup. Watch for knock activity if your tuning it... big boost on pump gas can be an issue. Dont ask how I know ;)