240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

old l28 and new stroker l28

Old 01-27-2008, 03:33 PM
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old l28 and new stroker l28

Here are a few pics of my old stock l28 engine and my new 300hp stroker l28 engine it isnt installed yet but is mostly all assembled ready to drop in hope you enjoy

















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Old 01-27-2008, 06:06 PM
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nice. what are you going to use for EFI management? also, what block did you use and how much did the stroker build cost you? cause im still wanting to do one since i have an extra engine lying around but being in college im a little tight on $$$$ and i hear some high prices and some lows.....
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Old 01-27-2008, 06:29 PM
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This is a complete list of whats in it and im using the stock efi. Complete Rebuilt Long Block Includes...

P90 Head
3 Angle Valve Job
Stage 3 Performance Cam Set
F54 L28 Block
89mm Flat Top Pistons
240Z Rods
LD28 Maxima Crank
Competition Head Gasket
New Bearings
New Gasket Set
New Oil Pump
New Water Pump
New Freeze Plugs
New Timing Chain Set
Complete Reassembly/Machine Labor
Valve Cover/Oil Pan Included
Shipping
Coated 3/2 Header
performance exhaust
6 New Injectors
Flywheel
Inlarged Throttle Body
Cold Air Intake
im not sure exactly how much but it was about 4,600$ which is some what reasonable for the parts that were instaled. some may disagree but its gunna tare up the track so im content haha
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Old 01-27-2008, 06:32 PM
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really.... stock efi think will handle it fine? what injectors are you going to use then?
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Old 01-27-2008, 06:58 PM
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new stock ones. The guy i had build it for me said the better thing to do would be to put a inlarged throttle body in with a cold are intake. he explaind it well he mostly said to have a dependable engine with the most horsepower this would be the way to go.
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Old 01-27-2008, 09:32 PM
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curious to know, was the engine tested on its 300hp? i dont want to be a *** or anything. just sounds like a hot n/a nothing to out of the ordinary.
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Old 01-27-2008, 09:49 PM
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well i cant say forsher but the guy that builds them he showed me a dyno of his engine which was the same mostly and it was 302hp but im planning on bring it to a dyno after its installed so well see
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Old 01-27-2008, 10:38 PM
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cant really tell on the picture but is that a hole on your from rail? if so i would be kinda iffy if had a 300hp engine in a car that has holes in its rails. would love some more info on this. just got a free l28 turbo block for my new build. just seeing what all went into your block. thinking of doing a stroker turbo.
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Old 01-28-2008, 07:52 AM
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i hear stroker turbo's render useless compared to stock bore turbo. plus they use a HUGE over bore for the 89mm pistons so adding boost doesnt sound good to me.
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Old 01-28-2008, 08:06 AM
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Originally Posted by snwbrderphat540
i hear stroker turbo's render useless compared to stock bore turbo. plus they use a HUGE over bore for the 89mm pistons so adding boost doesnt sound good to me.
Not "useless" but the weigh in between cost and hp may not be "worth" it to a lot of people.

Look at Jeff P's Turbo stroker: http://www.angelfire.com/extreme/280zxt/





Anyway, nice work byrneZ!!!
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Old 01-28-2008, 08:11 AM
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The rule of thumb is 1 cc for 1 hp. So you should need 300 cc injectors. You will also need a different ecu. Might want to patch up that frame while it's out too. That old 4 speed and R180 diff won't last long. Nice looking engine.
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Old 01-28-2008, 09:20 AM
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280Z had the R200 diff
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Old 01-28-2008, 11:38 AM
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Originally Posted by snwbrderphat540
280Z had the R200 diff
Not till late '77 with 5 speed.
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Old 01-28-2008, 01:30 PM
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really... thats wierd my dad 75 had one in it. but i was thinking of my 77 when i said that initially.
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Old 01-28-2008, 01:51 PM
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im not really thinking stroker just boring the block out. since i want forge pistons boring out the block seems reasonable. i know a guy with a stroker turbo motor. his name is warren and its TRULY a sick motor.
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Old 01-28-2008, 01:51 PM
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I'm pretty sure because I have a 6-77 with r180/4speed and a 7-77 with r200 and 5 speed.
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Old 01-28-2008, 02:04 PM
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Originally Posted by NismoPick
Not "useless" but the weigh in between cost and hp may not be "worth" it to a lot of people.

Look at Jeff P's Turbo stroker: http://www.angelfire.com/extreme/280zxt/





Anyway, nice work byrneZ!!!
Nismo, I've heard that the increased stroke gives a bad rod angle on the power stroke putting extra stress on the block from turbos. That pic shows evidence of that with the wear marks from the piston skirt. I've also read that the stroke kit only adds about 15 hp to a na motor.
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