Finally started up my 402 today!
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Finally started up my 402 today! I finally started up my 402 today, after my buddy helped me, and plugged in all my sensors and extensions, etc... We primed the engine and fired it up!
It took a while to fire up , but it did!! (It must have been the older 91 octane gas winter blend?? or that it was very old, etc...)
It fired up, idled rough , but very steady, it was just the new cam in there... oil pressure was right at near 55 or so, went down to 48/50 after warmed up....
I have a few issues though like a leak for coolant, but this was when the car was off and it was overfilled, after the car was on it didnt leak... I just let it idle til it fully warmed up , then turned it off as my cooling cycle..
I Will NOT change my oil til I drive it 20 or so miles...
Also Im hearing a banging sound, but it sounds like its near the middle of teh car, maybe a trans mount or heat shield...
Lastly,my tach isnt working ...
It took a while to fire up , but it did!! (It must have been the older 91 octane gas winter blend?? or that it was very old, etc...)
It fired up, idled rough , but very steady, it was just the new cam in there... oil pressure was right at near 55 or so, went down to 48/50 after warmed up....
I have a few issues though like a leak for coolant, but this was when the car was off and it was overfilled, after the car was on it didnt leak... I just let it idle til it fully warmed up , then turned it off as my cooling cycle..
I Will NOT change my oil til I drive it 20 or so miles...
Also Im hearing a banging sound, but it sounds like its near the middle of teh car, maybe a trans mount or heat shield...
Lastly,my tach isnt working ...
Cool. It's been a long time coming. Keep us posted! 
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Thanks, Ill check into that!
I think Im running too thick of an oil
3 qts 20 50 VR1, 2.75qts 15 40 rotellaT, .1 qt of random oil 5 30 non synthetic, when I first put in the lifters and rockers and a bottle of STP oil additive, which also is very thick..
so thats why Im seeing 50psi of oil pressure, vs when I used to see right at 40 at idle..
I think Im running too thick of an oil
3 qts 20 50 VR1, 2.75qts 15 40 rotellaT, .1 qt of random oil 5 30 non synthetic, when I first put in the lifters and rockers and a bottle of STP oil additive, which also is very thick..
so thats why Im seeing 50psi of oil pressure, vs when I used to see right at 40 at idle..
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thats about what I have in there, right now..
The Rotella was on my list from TSP of acceptable breakin oils for my 402. For my 500 mi change, I switched to the VR1 20W-50 with the STP additive (overkill maybe). My oil pressure is like 65 at start up and falls to ~55psi when warm. They also had me do 2 45 min runs at varying rpms, then change oil before driving. That was a little bit of a pain. I will hit the dyno next week hopefully. Good luck with yours.
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Thanks, Ill check into that!
I think Im running too thick of an oil
3 qts 20 50 VR1, 2.75qts 15 40 rotellaT, .1 qt of random oil 5 30 non synthetic, when I first put in the lifters and rockers and a bottle of STP oil additive, which also is very thick..
so thats why Im seeing 50psi of oil pressure, vs when I used to see right at 40 at idle..
I think Im running too thick of an oil
3 qts 20 50 VR1, 2.75qts 15 40 rotellaT, .1 qt of random oil 5 30 non synthetic, when I first put in the lifters and rockers and a bottle of STP oil additive, which also is very thick..
so thats why Im seeing 50psi of oil pressure, vs when I used to see right at 40 at idle..
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When you actually are able to get on it and do a couple WOT runs to redline, that 50psi will probably drop down to around 45 because the oil will get much hotter than if it were to just sit there and idle or even casual cruising around. I wouldn't worry about 50psi warm, the oil is not HOT yet, and that is where you really want your protection the highest. Also, if your rpms are higher then before at idle, that'll also bump your oil pressure slightly. Everything is looking good!
Im gonna go various rpms with high load and then engine brake..
instead of normall being at 30mph in 2nd gear ill be in 3rd andget on it, to case more load for the piston rings to expand..
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Drove the car around the block today... had severe bucking and in need of a tune...
reasons, old gas in the car.... but I went and put in some new 91 octane
MAF was plugged in, even though it had a speed density tune(maybe it shouldnt matter, if MAF isnt working-im unsure if it is at this point)
exhaust leak, I think from between the header collector and Y pipe
cam position sensor wires may be crossed...
we pulled out a spark plug and theyre already fouled after a few miles. So its excessively rich...
what Im gonna do is:
tow the car to my friends shop and
Im gonna use the high temp orange silicone to seal the exh leak
Im gonna fix my Camshaft position sensor and see if I get my tach working
im gonna start and see if it runs better...
then Im gonna tow it to the tuner, maybe change the spark plugs there and just break it in on the dyno...
reasons, old gas in the car.... but I went and put in some new 91 octane
MAF was plugged in, even though it had a speed density tune(maybe it shouldnt matter, if MAF isnt working-im unsure if it is at this point)
exhaust leak, I think from between the header collector and Y pipe
cam position sensor wires may be crossed...
we pulled out a spark plug and theyre already fouled after a few miles. So its excessively rich...
what Im gonna do is:
tow the car to my friends shop and
Im gonna use the high temp orange silicone to seal the exh leak
Im gonna fix my Camshaft position sensor and see if I get my tach working
im gonna start and see if it runs better...
then Im gonna tow it to the tuner, maybe change the spark plugs there and just break it in on the dyno...
Thread Starter
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From: Pasadena, CA
Thread Starter
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From: Pasadena, CA
Thread Starter
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I dunno who it was running rich, but it wasnt getting a good burn and the plugs had carbon on the electrodes...
exh leak, tricking the o2 sensors, bad gas, previous tune terrible for this settup? CKP wires crossed backwards? whatever it was, thats how the plugs came out...
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So today a good friend of mine, fixed my exh leak as well as recrossed the cam position sensor wires and now i have a tach!!
also we pulled out the spark plugs and one side looked excessively rich and the other with a good burn, so we figured if the even side bank (passenger side) wasnt getting any spark, and surely enough thats why it was running shitty...
the connector was loose on the pass side and we reconnected it and it felt like it idled better as well as it was more responsive when we gave a quick blip on the throttle...
I let it fully warm up and we test drove it again... felt muccchhh better and responsive, as well as i felt good torque....
I drove around in 2nd and 3rd gear mostly and went WOT til 4000rpms and no more and let the engine brake down... I did this numerous times and we parked he car and a bit later I finally got to drive it home!!
Im very happy and will get it tuned very soon!!!...
also we pulled out the spark plugs and one side looked excessively rich and the other with a good burn, so we figured if the even side bank (passenger side) wasnt getting any spark, and surely enough thats why it was running shitty...
the connector was loose on the pass side and we reconnected it and it felt like it idled better as well as it was more responsive when we gave a quick blip on the throttle...
I let it fully warm up and we test drove it again... felt muccchhh better and responsive, as well as i felt good torque....
I drove around in 2nd and 3rd gear mostly and went WOT til 4000rpms and no more and let the engine brake down... I did this numerous times and we parked he car and a bit later I finally got to drive it home!!
Im very happy and will get it tuned very soon!!!...
So today a good friend of mine, fixed my exh leak as well as recrossed the cam position sensor wires and now i have a tach!!
also we pulled out the spark plugs and one side looked excessively rich and the other with a good burn, so we figured if the even side bank (passenger side) wasnt getting any spark, and surely enough thats why it was running shitty...
the connector was loose on the pass side and we reconnected it and it felt like it idled better as well as it was more responsive when we gave a quick blip on the throttle...
I let it fully warm up and we test drove it again... felt muccchhh better and responsive, as well as i felt good torque....
I drove around in 2nd and 3rd gear mostly and went WOT til 4000rpms and no more and let the engine brake down... I did this numerous times and we parked he car and a bit later I finally got to drive it home!!
Im very happy and will get it tuned very soon!!!...
also we pulled out the spark plugs and one side looked excessively rich and the other with a good burn, so we figured if the even side bank (passenger side) wasnt getting any spark, and surely enough thats why it was running shitty...
the connector was loose on the pass side and we reconnected it and it felt like it idled better as well as it was more responsive when we gave a quick blip on the throttle...
I let it fully warm up and we test drove it again... felt muccchhh better and responsive, as well as i felt good torque....
I drove around in 2nd and 3rd gear mostly and went WOT til 4000rpms and no more and let the engine brake down... I did this numerous times and we parked he car and a bit later I finally got to drive it home!!
Im very happy and will get it tuned very soon!!!...
Awesome! I bet you're super excited =D
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From: Pasadena, CA
Thread Starter
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From: Pasadena, CA
Drove my 402 some more today.... Feels nice... I checked my oil and Im gonna change it soon, Im seeing small deposits in it already... Im unsure, but Ive put under 15 miles on it as of now...
I keep giving it bursts anywhere from 1500-2000rpms and going WOT to 4000 and engine braking... Mostly in 2nd and 3rd gears... 1 or 2 times in 4th...
is there any other break in method I should be following?
I keep giving it bursts anywhere from 1500-2000rpms and going WOT to 4000 and engine braking... Mostly in 2nd and 3rd gears... 1 or 2 times in 4th...
is there any other break in method I should be following?