|
|
|
|
|
Register To Post |
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
 
|
Thanks!
............. I did some more work. heads are on      rockers are on and valve lash is adjusted  |
||
Posted on: 2010/6/1 11:06
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
 Transfer
|
 
|
||
| SpectatorRacing | Re: Engine rebuild/upgrade project | ||
|
Elite Guru
 
|
what? You didn't paint the block Chevy orange? Shame on you!
|
||
Posted on: 2010/6/1 20:46
|
|||
|
_________________
aka Scaryfast |
|||
|
Transfer
|
|
||
| flyboy | Re: Engine rebuild/upgrade project | ||
|
Elite Guru
|
How much pre-load did you put on the lifters?
Looks great! |
||
Posted on: 2010/6/2 3:32
|
|||
|
_________________
'91coupe, LT4Hotcam, some other stuff. If it's too loud, you're too old. "He works on old cars, then junks 'em" |
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
I've put 1/4 turn. That was working for me on my
previous lifters. But I modified valve covers so that I can take them off in a minute and I plan to readjust with engine running. |
||
Posted on: 2010/6/2 6:30
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| biggrizzly | Re: Engine rebuild/upgrade project | ||
|
2011 Memorial Day Car Show Winner!
 
|
I put a 1/4 turn on mine too, but for some gut feeling I should have went 1/2
Aren't those ARP bolts so nice!!! I love quality stuff!! |
||
Posted on: 2010/6/2 12:24
|
|||
|
_________________
Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways. |
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Quote:
 Quote:
They sure are! And the feeling is very good when tightening them. No stretching whatsoever. |
||
Posted on: 2010/6/2 13:26
|
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
...................
- new Melling M-select oil pump   - new canton RR oil pan   - intake mainifold and valve covers are on   - engine and trans connected and ready to be installed  ........... |
||
Posted on: 2010/6/27 9:54
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| PeteK | Re: Engine rebuild/upgrade project | ||
|
Moderator
 
|
Looks good Bruno.
Did you degree the cam in, or just line up the dots? If you did degree it, I am curious as to where you placed it. |
||
Posted on: 2010/7/5 2:57
|
|||
|
_________________
"It was really on a pass until it came apart." "Yeah. They always are." |
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Thanks Pete!
I've installed it straigt up (lined up the dots) and then rechecked it with degree wheel and dial gauge to see if everything is within the specs. I'm a little behind with posting and pics. The engine is allready in the car and I've fired it. I had some trans problems but I've sorted that out. Right now, Mick (mseven) and I are trying to get the tune right. I'm having some idle issues. Engine is running waaay too rich at idle. Right now I'm waiting for a new O2 sensor to come, as mine is not in the best condition. I've started a thread on another forum but I won't start a new one here, I'll just C/P from there: C/P In short here are engine specs - 2bolt block, overbored 0.020" - stock crank - SCAT forged rods 5.7" - SRP forged pistons, flat-top - #113 heads, ported, 2.02/1.60 valves - ported superram - #24 FMS injectors - Hooker LT headers - CC XR288HR cam, 288/294 adv., 236/242 @.050", .55"/.57" lift, 110 LSA I'm having my tune done by Mick (mseven). Engine fired right up with his first tune but it was running rough and very rich. From datalogs, we have noticed that vacuum is low (70+ kPa). So I tried to find if there are any vacuum leaks or other mechanical problems. I did find some issues, but I sorted them out and I still have the same problems. Problems are next: When I start the engine it runs stable but very rich. WBO2 is showing high 11 to low 12AFR and considering the size of the cam and overlap, I think that it's even more rich than that. As the engine is heating up the problems start. Engine wants to stall and sometimes it stalls if I don't blip a throttle. Idle starts to go up and down all the time. IAC ccounts are allways going down. From the moment when I start the engine IAC counts are slowly going down, until they finally reach zero. If I adjust the throttle screw I can get them to raise, but again, as the engine is running IAC starts to drop. Map signal is acting very similar. As I start the engine, it's stable at lower 70's but as the problems with stalling start, MAP starts to jump all over the place. I guess that it's normal that it jumps to 90 because engine almost stalls. All the time there is way too much fuel as I can see it smoke and it really burns the eyes. If I start to drive, WBO2 starts to show 14.5-15 AFR and the smoking stops. But as soon as I stop and the engine starts to idle, AFR gets really rich. As for vacuums, I have plugged everything except MAP, fuel regulator and PCV hoses. I have tried to plug the TB with engine running and listen for any vacuum leaks but I can't hear anything. Any inputs and ideas are welcome! |
||
Posted on: 2010/7/5 10:28
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
update...........
  new TPIS TB vs stock one   ready to start  and a short video |
||
Posted on: 2010/7/11 11:47
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| flyboy | Re: Engine rebuild/upgrade project | ||
|
Elite Guru
|
Is the rich idle fixed yet? It appears you have the speed/density (MAP) system and a much bigger cam than stock.
This explanation made the most sense to me. The big cam causes lower vacuum at idle. The MAP sensor reads this to mean you are accelerating and gives more fuel causing the problem. The tuners job is to fix it. I had the exact same situation at idle with my LT4 "Hotcam", a much milder cam than tours. Yes, when the engine started to warm up it got real bad. I assumed this was from going into closed loop. It's fine now. Thanks for all the words and photos on the build. Sure looks nice. |
||
Posted on: 2010/7/11 12:20
|
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Thanks!
Mick (mseven) and I are trying to work it out. I had a bad O2 sensor, so we didn't do much last few days, but my new O2 should be here any day now. I hope that we'll work it out soon. I'll post the results anyway. |
||
Posted on: 2010/7/11 13:48
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| Vetron87 | Re: Engine rebuild/upgrade project | ||
|
Elite Guru
|
Looks great Bruno!
 |
||
Posted on: 2010/7/11 13:54
|
|||
|
_________________
Bone stock 87 conv. |
|||
|
Transfer
|
|
||
| Eagle223usa | Re: Engine rebuild/upgrade project | ||
|
Guru with Eyes of Steel
 
|
Wow, just wow! Nice build, you have skills Brother.
|
||
Posted on: 2010/7/14 17:01
|
|||
|
_________________
God Bless America! |
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Thanks guys!
I really hope that I'll have issues sorted out soon because I'm really anxious to see/feel how will the car run. |
||
Posted on: 2010/7/14 20:18
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| PeteK | Re: Engine rebuild/upgrade project | ||
|
Moderator
|
Quote:
Don't let it get you down. I have a few decent issues myself. Tune seems to be quite good, right off the bat, but the fluids leaking out are definately my doing, and a bummer to fix. |
||
Posted on: 2010/7/14 22:47
|
|||
|
_________________
"It was really on a pass until it came apart." "Yeah. They always are." |
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
.............
update Finally I have some good news. I've found a small crack on PCV hose and installed a new O2. Along with a new tune from Mick, it gave some really good results. I'd really like to thank Mick (mseven) for all of his help. Idle is much smoother and there is no more smoking. There is still some fuel smell but I believe it's mostly because of the cam size. I've ordered eprom emulator from Craig Moates and I'll try to play with the tune myself a little bit with real-time tuning. I believe that it should make things much easier. But even without that, I'm really happy with how engine runs now. I've driven the car for a little bit and it's much better than I expected. It's really drivable even in the low rpms. But when it gets past 3k rpm, it really starts to feel powerfull. Throttle response is absolutely great. I still need to try out the WOT driving but I'll do that after a couple hundred miles, after some break-in driving. Also, I did a new exhaust a few weeks ago, so here are a few pics of it:   |
||
Posted on: 2010/8/10 18:14
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| mseven | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Quote:
Bruno, You are very welcome, and I'm glad to hear that it is running well. To others who read about his project, including tunning a modded car it is important to note that without someone on the other end doing their part it cannot happen. I believe that a good tune can be attained long distance through acquiring good data. However, if the data is skewed through various inputs, no tunning in the world can make that right. Bruno hung in there and went over various things that I suggested including sensors, leaks etc. to get his car right (just think what it must be like getting parts etc. where he lives !!). I commend his patience and all his efforts in making his project a reality....Great job! btw I really like the new exhaust. Mick |
||
Posted on: 2010/8/11 11:16
|
|||
|
Transfer
|
|
||
| sliding | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Thanks Mick!
I know that this one is not topic related, but I'm just so happy that it's on the road again, I just have to post it:  |
||
Posted on: 2010/8/24 10:29
|
|||
|
_________________
'90 L98 auto with a lot of mods |
|||
|
Transfer
|
|
||
| Ultraman | Re: Engine rebuild/upgrade project | ||
|
2015 Memorial Day Car Show Winner!
|
I'll bet it sounds great! Looks mean, you did good!
|
||
Posted on: 2010/8/24 17:17
|
|||
|
_________________
2010 Grand Sport Coupe Gone but not forgotten... Vote DeSantis in 2024.... Make the IRS go away... |
|||
|
Transfer
|
|
||
| BrianCunningham | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
 
|
cool, especially with what you had to go through just to get parts!
|
||
Posted on: 2010/8/25 0:25
|
|||
|
_________________
Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
|||
|
Transfer
|
|
||
| RedGut86 | Re: Engine rebuild/upgrade project | ||
|
Guru Newb
|
Quote:
Sounds like it is running good but if you do go back in, I've found for the engine running method, cutting a piece of 6-8" tall cardboard to fit in the head makes it a lot less messy. As for pre-load, I've heard everything from 0 lash to 1/2 turn. I usually just try to look up the lash specs on the lifters and go from there. If you are really at 1/2 lash I bet you'll be fine. |
||
Posted on: 2010/8/25 8:22
|
|||
|
Transfer
|
|
||
| mseven | Re: Engine rebuild/upgrade project | ||
|
Senior Guru
|
Bruno,
the car looks great ....I'm sure it's fun to be driving again, instead of working on it. Mick |
||
Posted on: 2010/8/25 11:48
|
|||
|
Transfer
|
|
||
You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
|
|