Z-Gad Posted October 30, 2004 Share Posted October 30, 2004 http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7930627363&category=33742 If this claim is out of an L28, I've gotta raise the BS flag on it... Quote Link to comment Share on other sites More sharing options...
PhaTTy Posted October 30, 2004 Share Posted October 30, 2004 I've seen a couple guys get 700+ RWHP out of an L28 with mostly stock internals.. That huge of a turbo with massive injectors and good fuel management can get a L28 up in the 600hp range with high boost.. add 100 shot of NOS and 700hp is doable.. Probably wouldn't last long if you kept it that high all the time, but YES it has been done by at least two people I know of before Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted October 30, 2004 Author Share Posted October 30, 2004 The major restriction here is the cylinder head. The inlet and outlet on the same side is really a killer. I have been around the L28 for quite some time and have seen guys make 400rwhp on basic stock internals (but not for very long reliably) with bolt on mods, but even the big hp guys with forged motors, lots of head work, and nitrous are only in the 550+ range...sorry, I'll only believe that one from a reliable source with documentation to back it up. Quote Link to comment Share on other sites More sharing options...
speeder Posted October 30, 2004 Share Posted October 30, 2004 That's a pretty small intercooler - and you have to wonder about a guy that uses both a Haltech and a TEC2. Let the BS flag wave. Quote Link to comment Share on other sites More sharing options...
Guest Zcarsmakemyheadhurt Posted October 30, 2004 Share Posted October 30, 2004 I have riddin in that car, and Ricky lands over 600HP on a regular basis. It has forged pistons and electromotive ignition with I belive a F9 fuel computer may be a E6K not sure. Can't wait to race him. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted October 30, 2004 Share Posted October 30, 2004 Thomas @ Z Service Unlimited in Smyrna, GA had a documented and Dyno'd 622 HP in his 280 ZXT @ 29 lbs. boost - no NOS. I have ridden in the car and it was awesome. Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted October 31, 2004 Share Posted October 31, 2004 Sounds about right. That turbo is good for ~1000hp and at 29psi of boost he should make in the 600+hp@wheels range. I thought about putting my GT42R on the L, but have decided to sell my motor and go RBpower with a GT42R. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 1, 2004 Share Posted November 1, 2004 whoa... and the established limits of the L28ET have just been rocked I thought 450rwhp was the limit on even modified bottom ends, but couldn't understand why they couldn't be made to put down more. I just had this conversation with someone else on this board and was giving him apparently, the wrong info... gonna go point him to this post. Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 1, 2004 Share Posted November 1, 2004 450? Where did you get that low number? Electromotive was cranking out 580HP on stone age fuelcontrol only EFI (TEC1) back in 1983... That was state of the art, then. Now with modern EFI controlling both fuel and spark, that number is available for street cars... Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 1, 2004 Share Posted November 1, 2004 Well... for one I wasn't considering race motors, and I"m not sure if this 600+hp motor they are talking about is street or race or what. The higest hp legit street L28ET motor I recall reading about is Jeff's 450hp 280ZX. I seem to recall reading others saying that this was about the limit, but I really dont know when/where/how many times I may have read that. Until now, I hadn't heard any specific substantiated claims of such high hp from an L28, or if I had I don't remember it. I figured it had to be possible though... with enough $$$, anythings possible, right? either way, I'm shocked to hear of an L28 putting down so much power, but I can believe it. Quote Link to comment Share on other sites More sharing options...
Brad-ManQ45 Posted November 1, 2004 Share Posted November 1, 2004 To be fair, Tho,as DID have a stroker crank in his...but he was turning 6800 rpm... Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted November 1, 2004 Share Posted November 1, 2004 The higest hp legit street L28ET motor I recall reading about is Jeff's 450hp 280ZX. I guess my car is not legit? Dynoed 451hp/509ft-lbs@wheels running balls rich without the nitrous(125shot). Based on the 134.1mph trap speed the car is making about 510hp@wheels. Also, this is with the converter not putting full power potential to the ground. I am sending it back to have it tightened up on the topend. I hope to see 136-137mph trap speeds. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 1, 2004 Share Posted November 1, 2004 I guess my car is not legit? Uh.. no dude' date=' I'm not saying that, to you or anyone else who's Z is putting down excess of 450hp. The higest hp legit street L28ET motor I recall reading about is Jeff's 450hp 280ZX. Until now, I hadn't heard any specific substantiated claims of such high hp from an L28, or if I had I don't remember it. I figured it had to be possible though... with enough $$$, anythings possible, right? I said that I RECALL reading about, and that if I had heard of any claims of any higher than that I didn't remember it. Obviously, I"ve missed a few posts or not read everyones sig's to know, or I'd not have been under the impression that 450hp was the 'limit' on these motors. Sorry if you somehow took offense..... Quote Link to comment Share on other sites More sharing options...
frank280zx Posted November 1, 2004 Share Posted November 1, 2004 From what i read in 'how to modify your datsuan OHC engine' they even make close to 700 with the paul newman l28, though i would like the twin turbo V8 of his later car however those cars are extremly modified, on stock bottom ends 350 is kind of the durabillity limit right ? Quote Link to comment Share on other sites More sharing options...
Guest Zcarsmakemyheadhurt Posted November 1, 2004 Share Posted November 1, 2004 Na, most everyone on this board makes 350hp with stock bottom ends. I think the first limit on a stock short block is the rod bolts and they are still good for over 400hp I would say. Quote Link to comment Share on other sites More sharing options...
Clifton Posted November 2, 2004 Share Posted November 2, 2004 Making over 500 rwhp on a stock motor is not hard. Just a bigger turbo (more lag), more boost and C16 fuel. As long as detonation is avoided it will hold up. Most people struggle to make 300-350rwhp because they are using turbos that are too small and will only flow enough air for 300-350 rwhp. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 2, 2004 Share Posted November 2, 2004 see more 'established' limits being debated here. Even the sticky thread on top of this forum suggests that the stock block is only good up until about 350rwhp. I expect that the stock Nissan shortblock (the block, crank, pistons, rods, bearings, etc) can be pushed to a maximum of about 350hp. Anything over that and you are likely throwing reliability into the wind. For a really stout and reliable 300hp+, you should consider going with forged pistons. Pre-detonation can kill a turbo engine by melting pistons and breaking ring lands in under a second. Forged pistons will give you a bit more of a buffer. So be careful setting up your engine, and take it easy until you know your not too lean! If you are planning on an engine with more than 400hp, you will need to do some connecting rod prep as well. One more area of concern, the headgasket. Headgaskets rarely will blow without detonation occurring. If you are going nuts (over 400hp is nuts!) then you should look into block o-ringing or a metal headgasket of some sort. So which is it? Is a 100% stock block good for over 350hp? Or are small turbo's the limiting factor? I thought the average T3/04 hybrid was worth more power than that? Frank280zx - thanks that's the info I've been looking for for a while I've always wondered how much hp paul newman's car had.. figured it had to be up there. Quote Link to comment Share on other sites More sharing options...
Clifton Posted November 2, 2004 Share Posted November 2, 2004 This is his opinion. My stock unkown mileage junkard block made over 400 rwhp at boost and timing that I "could" run with pump gas. I road race it at this level and it sees 3500(min) to 7500 RPMs for 30 minutes straight 3-4 times a day per race. In one day it probably gets beat on harder than most of the street cars on here get in a year. I haven't broke a piston since I've been running the stock P90's. There is no reason the stock P90 motor cannot make over 500 with more boost. A 2JZ will make around 450-480 with a small turbo(T56) at 18-20 psi. Put a T67 on and 28 psi and it's around 600RWHP. see more 'established' limits being debated here. Even the sticky thread on top of this forum suggests that the stock block is only good up until about 350rwhp. I expect that the stock Nissan shortblock (the block' date=' crank, pistons, rods, bearings, etc) can be pushed to a maximum of about 350hp. Anything over that and you are likely throwing reliability into the wind. For a really stout and reliable 300hp+, you should consider going with forged pistons. Pre-detonation can kill a turbo engine by melting pistons and breaking ring lands in under a second. Forged pistons will give you a bit more of a buffer. So be careful setting up your engine, and take it easy until you know your not too lean! If you are planning on an engine with more than 400hp, you will need to do some connecting rod prep as well. One more area of concern, the headgasket. Headgaskets rarely will blow without detonation occurring. If you are going nuts (over 400hp is nuts!) then you should look into block o-ringing or a metal headgasket of some sort. [/quote'] So which is it? Is a 100% stock block good for over 350hp? Or are small turbo's the limiting factor? I thought the average T3/04 hybrid was worth more power than that? Frank280zx - thanks that's the info I've been looking for for a while I've always wondered how much hp paul newman's car had.. figured it had to be up there. Quote Link to comment Share on other sites More sharing options...
evildky Posted November 2, 2004 Share Posted November 2, 2004 I think the confusion was the stock pistons tend to be good for only 400-450 whp right? so with the forged pistons and maybe shot peened rods that number can be pushed way up, I was soo amazed at SEZ3 to see sooo many cars putting over 400hp to the wheels, if it wasn't in the 11's it was slow, I hope to get there one day, but I am thinking 400 whp will keeop me happy, speed cost maney and I can't afford to go any faster than that Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted November 2, 2004 Share Posted November 2, 2004 Well I'm glad this thread got started and all this info getting clarified for me. It's good to know that should the desire ever arise and the bank balance to match, there's still so much power left to unlock on my stock motor Quote Link to comment Share on other sites More sharing options...
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