Joe Rainville
New Member
- Joined
- May 6, 2015
- Messages
- 5
Hi Guys,
I accidentally bought a project car that was supposed to be a nice condition original, 68,000 mile car. It had no codes or issues via the scanmaster gauge except a lousy idle and hunting IAC. While chasing a rough idle, turns out the timing chain had jumped because someone replaced the cam and lifters, but when they did the chain, they only replaced the top gear. So, the chain stretched and jumped. While looking to repair that, I pulled the rear main bearing to replace the seal (since I pulled the pan) and found the bearing was down to the copper.
What I though was an original engine had a "260" grind cam and 0.030" over Summit Racing pistons on the worst quality rebuild I have every, every seen. Even the hone job was trash. So here we are. My crank is scored, bores are questionable. I already had the intake corrosion repaired around the coolant ports, new Delphi fuel injectors, (new 20% over stock fuel pump), new stock replacement ignition system, (except the cam sensor), most all new sensors on the intake such as temp, TPS, IAC etc. I have a Cordone rebuild MAF and a new factory turbo. Stock intercooler stays but the terrible hack 3" exhaust will be updated. Aside from the overbore and cam, the motor looked 'stock'. Here is what I have in mind for my rebuild:
Regrind or new crank. Looking at stroker vs. std stroke kits. Have the block evaluated to see if the 0.030" overbore is useable or if I need to go 0.040" to clean up the mess. Pistons are a question as T/A sells 8:1 cast, while GN1 sells more expensive forged. I am planning a mild roller cam and roller lifters. Thinking of TA Steet Intimidator aluminum heads and increasing the head bolt count from 8 to 14. Probably going to add billet main caps for the center two, plus line bore, decking and whatever else my block needs. I want to keep the stock intake and valve covers for factory appearance. A full SS exhaust with street headers and a 3" downpipe with the built in wastegate will replace the factory cast elbow.
End goal is a smooth idle, good drivability and of course more power over the stock 247/355. HP goal is around 350-400 ish hp on pump gas. And ya, going to get the 200R rebuilt while I am at it...
Questions: Does this round reasonable? What about the factory computer? Are folks still burning chips?
Thanks,
-Joe
87 GN, chasing demons out of it since 2016.
I accidentally bought a project car that was supposed to be a nice condition original, 68,000 mile car. It had no codes or issues via the scanmaster gauge except a lousy idle and hunting IAC. While chasing a rough idle, turns out the timing chain had jumped because someone replaced the cam and lifters, but when they did the chain, they only replaced the top gear. So, the chain stretched and jumped. While looking to repair that, I pulled the rear main bearing to replace the seal (since I pulled the pan) and found the bearing was down to the copper.
What I though was an original engine had a "260" grind cam and 0.030" over Summit Racing pistons on the worst quality rebuild I have every, every seen. Even the hone job was trash. So here we are. My crank is scored, bores are questionable. I already had the intake corrosion repaired around the coolant ports, new Delphi fuel injectors, (new 20% over stock fuel pump), new stock replacement ignition system, (except the cam sensor), most all new sensors on the intake such as temp, TPS, IAC etc. I have a Cordone rebuild MAF and a new factory turbo. Stock intercooler stays but the terrible hack 3" exhaust will be updated. Aside from the overbore and cam, the motor looked 'stock'. Here is what I have in mind for my rebuild:
Regrind or new crank. Looking at stroker vs. std stroke kits. Have the block evaluated to see if the 0.030" overbore is useable or if I need to go 0.040" to clean up the mess. Pistons are a question as T/A sells 8:1 cast, while GN1 sells more expensive forged. I am planning a mild roller cam and roller lifters. Thinking of TA Steet Intimidator aluminum heads and increasing the head bolt count from 8 to 14. Probably going to add billet main caps for the center two, plus line bore, decking and whatever else my block needs. I want to keep the stock intake and valve covers for factory appearance. A full SS exhaust with street headers and a 3" downpipe with the built in wastegate will replace the factory cast elbow.
End goal is a smooth idle, good drivability and of course more power over the stock 247/355. HP goal is around 350-400 ish hp on pump gas. And ya, going to get the 200R rebuilt while I am at it...
Questions: Does this round reasonable? What about the factory computer? Are folks still burning chips?
Thanks,
-Joe
87 GN, chasing demons out of it since 2016.