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1G block/head rebuild, recommendations wanted

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90gsxProjectCruiser

Proven Member
61
5
Jun 22, 2014
Port Orchard, Washington
Hey what's up everyone. I'm thinking about getting into some low key rally events in my area. I have a spare block that I want to build. I think I'm going to be limited to the 14b turbo for now. probably 92 oct. looking for recommendations on bottom internals, compression ratio.
I don't want to build this and end up changing the build later on if a better turbo comes into my budget. reliability is my number one. I'm not too sure what to expect for whp with the stock turbo but later on I'd like to be able to achieve 3-400. if its not too much trouble can anyone who knows what they are talking about give me some ideas on where to go with this? it would be much appreciated!
1990 GSX
6bolt block/head
stock 14b for now
92 oct.
set up for minimal lag, daily driven capable, weekend warrior entry level rally.
closer to 300hp than 200hp?
 
Unless the block is already disassembled, I would keep it all stock and do all the free mods and bolt-ons with link, and you will be good to go. If the block is already disassembled then I would just get some eagle rods with ross pistons at 8.5cr and call it good from there, along with all ARP hardware.
 
3to 4 I'd do 2g pistons on 1g rods since you're already opening it up. Then link and injectors. 14b will get you mid 200s for power. I'd go evo 16g or a 20g in a 7cm housing. They will get you closer to that 400 number without sacrificing much spool.
 
I have a spare block that I don't know anything about. So I plan on opening it up and figuring out what I want to do with it. Probably slowly prep it and get it ready over the next couple months as finances become more available. I really appreciate the recommendations! thank you!
 
One pro for going to an Eagle / Wiseco combo is a full floating wrist pin, which would rev easier, since a full floating setup is naturally free(r) of friction then a press pin setup (IE stock DSM pistons / rods)
 
Depending on your budget, you can’t go wrong with refreshed healthy six bolt, I’m pushing 35 psi on my rebuilt stocker flowing over 50lb/per min! All arp hardware I decided to rebuild with stock rods and pistons because the machine shop said they looked great, just needed new rings bearings, valve stem seals etc. it’s nice to drop in forged internals if you have the money, but unless you’re shooting for 5 to 600 plus I’d say it’s overkill
 
I'm in the same boat. Block and head at machine shop for a rebuild. 3-400hp is plenty for my 2450lb Colt, which is fwd.
My other Colt is 299hp with e316g @19psi. Stock old tired motor with BC cams link v3 and 750fic and stock fuel system. Wheel spin galore.
I'm also debating piston rod choice. I don't want to cheap out, but don't want to waste money unnecessarily. Not planning for much more boost than 20-22 on e316g.
I might spend the effort on the head though, p&p and larger valves.
First world problems!

Honestly, a stock rebuild (maybe with ARP hardware) will hold 300-400 HP as long as the tune is fine. At those levels, I really don't see any need to go super crazy. I actually did the same thing on my car getting it ready for a 16G setup.
 
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A stock block build with the right parts, maintenance, and tune will take you to 500hp.
While I don't quite make 500 hp I do have a stockish 4g63 that has treated me very well.
15 years ago I had a 4g63 put together. It had Wiseco pistons, hung on 1g fat rods and Arp head studs/cometic head gasket. Stock everything else.
The engine has been on stock frame turbos its whole life from pump gas to race gas and now ethanol. The past 2 years of which on the 68hta it makes 391/355 to the wheels through an automatic spiking 32psi and clicked off a 10 second pass. Inbetween there I've blown a few headgaskets and maxed out 16g turbochargers, daily driven it for 8 years straight, more 1/4 miles passes then I can keep track of.
It's gone though a dozen transmissions and clutches even a manual awd to auto fwd shell swap. (WHO DOES THAT?!?!?)
It sports a permatorque headgasket, l19s, hks272s, and evo beehives now. But it's the same damn engine from 15 years ago! My point is you don't have to go crazy to keep the 4g63 reliable and hold up. 4g63 power!
 
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