|
|
|
08-06-2012, 01:27 PM
|
||||||
|
||||||
|
383 LT1 what ring gap?
On my way to pick up my new block from the machine shop.
its a 383 lt1 (modern) with 11.88 compression. I'm shooting for 550 whp. the motor is a weekend warrior and will start to see a 125hp shot of nitrous later in the season. what would you set the ring gap at? 
|
|
08-06-2012, 02:15 PM
|
||||||
|
||||||
|
383 LT1 what ring gap?
On my way to pick up my new block from the machine shop.
its a 383 lt1 (modern) with 11.88 compression. I'm shooting for 550 whp. the motor is a weekend warrior and will start to see a 125hp shot of nitrous later in the season. what would you set the ring gap at?
|
|
08-06-2012, 02:32 PM
|
||||
|
||||
|
Pretty good info here: www.aa1car.com/library/ring_end_gap.htm
|
| The Following User Says Thank You to ssimpala For This Useful Post: | ||
Eric63M (08-07-2012) | ||
|
08-06-2012, 02:42 PM
|
|||||
|
|||||
|
dont forget to add for the NO2
|
|
08-06-2012, 07:20 PM
|
|||||
|
|||||
|
Quote:
|
|
08-06-2012, 07:34 PM
|
||||||
|
||||||
|
thanks for all the replies.
Joelster - for this season i'm limiting it to 125hp worth but next year its game on. I'll be competing in a LTX shootout and going into the power adder class and running 350 direct port shot. For this season its just going to stay at 125 and making sure i can get the power to the ground. Would you say gap for the 350 now or at the end of the season when i tear it down?
|
|
08-06-2012, 08:40 PM
|
||||
|
||||
|
I'd run plasma molys and set the gap .008- .010 top .009-.012 second
|
|
08-06-2012, 09:08 PM
|
||||||
|
||||||
|
This is a double post.........and .008-.010 top .009-.012 second???????????????? he's going to run nitrous!
|
|
08-06-2012, 09:26 PM
|
||||
|
||||
|
exactly he didn't ask for piston clearance he asked for ring gap and plasma molys can be run alittle tight
|
|
08-06-2012, 10:46 PM
|
||||||
|
||||||
|
IMHO, I second those gaps are too tight, especially for nitrous, and even a NA.
JE recommends: Street turbo or nitrous, bore x .0050, bore x .0055 1st and 2nd rings and .015 oil. That's .020 and .022 for a 4.030 bore. Nitrous race only even wider, .0070 and .0065 per inch of bore. If you wanted tightening them up a bit, I would never go tighter than .0040 and .0045, top and second ring with NOS regardless of the ring material. Myself, I wouldn't deviate from the manufacturers recommendation.
__________________
Horsepower is how fast you hit the wall. Torque is how far you take the wall with you. Midnight Sun Street Rod Association
|
|
08-07-2012, 05:23 AM
|
||||||
|
||||||
|
The merge is complete.
I'm on board with 68's recommendation unless the pistons are KB Hypereutectic's in which case you need even more gap on the top ring. What type piston are you going with?
__________________
BSE Racing Engines
|
|
08-07-2012, 07:03 AM
|
||||||
|
||||||
|
Thanks for the replies everyone.
68nova - I'll call the manufacturer today and see what they recommend. engineczar - The pistons are forged JE -5cc flattops. then for the rest of the bottom end a Callies magnum XL crank and H beam rods. Last edited by Eric63M; 08-07-2012 at 07:10 AM. Reason: put the wrong crank in
|
|
08-07-2012, 07:33 AM
|
|||||
|
|||||
|
I'd get a set of gapless from total seal. they work great and pick up a few hp. i run then in my more serious builds.
|
|
08-07-2012, 07:03 PM
|
|||||
|
|||||
|
Quote:
^^my car is the camera car. Might not be a shootout next year. Run it N/A this year and I will see you in Mod N/A!
|
|
08-07-2012, 07:40 PM
|
||||||
|
||||||
|
That is the shootout. Don't think this year is going to happen unfortinatly. After all the set backs and going extremely over budget on this build I'm not sure if it will be together in time, this is how its sitting so i still need to tune it massively, and dial in the rear suspension.
 Next year for sure will be competing, this year if possible i will trailer it out and see. What is the index for mod N/A and any restrictions? I'm sitting with a S60, twin plate clutch, stage 4 t56, 10pt cage, and this engine i'm building. and only weigh in at 3085lbs with my last engine (without me) so 3300 with me in it roughly. Any fuel limitations? btw your car sounds good, which cam do you have in there?
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| ring gap help. | 72fordlb | Engine | 3 | 05-11-2009 08:31 AM |
| ring gap ? | str8lnr | Engine | 3 | 04-06-2009 09:43 AM |
| What can I do about too much ring gap? | weirdbeard | Engine | 30 | 02-17-2009 03:55 PM |
| Ring Gap | mightycarlo10 | Engine | 3 | 01-03-2008 11:11 AM |
| Seeking 383 chevy ring gap specs | surfshark | Engine | 8 | 09-22-2006 07:23 AM |
