Originally Posted by Spooler That engine is going to cost more than a FI setup. Mucho more if you want to get near 400whp. It's not worth it. The block
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12-22-2014, 03:29 PM | #16 (permalink) |
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The block im purchasing is only 350 bucks, so that a cheap start to rebuilding the motor. I don't have a horsepower ego, yes lot of cars will be faster than me in the straight I don't care. Im building the car the way I want, that's whats most important
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12-22-2014, 09:47 PM | #17 (permalink) | |
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To get 400rwhp, you WILL need higher compression and significantly enhanced cam lift and duration as well as a bottom end and oiling system that will remain safe at 8800 to 9000rpm. Once you raise the compression, you are going to seriously assess your fuel ... with e85 the obvious solution. JUN cams and retaining VVEL will not cut the mustard - you will get close, but not exceed 400rwhp. The other issue you will have is the ECU - the OEM ECU is not going to do the job. |
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12-23-2014, 02:23 AM | #19 (permalink) | |
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12-23-2014, 08:27 AM | #20 (permalink) |
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Ditching the VVEL required you to ditch the stock ECU. You've got to run a standalone. That's the big hurdle for a lot of people. Standalones for this platform are not OBD compatible, meaning you end up with a car you can't get inspected.
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12-24-2014, 04:24 AM | #22 (permalink) |
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VVEL cannot safely give you the lift/duration you need which is why you you need the HR heads. It may well be able to do it BUT the investment needed would be significant - easier to go HR head conversion, but that means non-OEM ECU which gives your all the local road/licensing/inspection authority problems.
All the Grand Am engines make 400whp and not one of them retained the VVEL. None of the choices are easy. |
12-24-2014, 07:38 AM | #24 (permalink) |
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I was toying with the idea of running the JUN high comp pistons with my stillen supercharger build, I believe they are 12.3:1
although if you are wanting around 400rwhp or so, why not just go a VK56/LSx, either of those with basic breather mods will run that HP all day long as it'll almost be a standard setup, this is if you are going down the route of running a different ECU etc.. |
12-24-2014, 05:18 PM | #25 (permalink) |
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I have had long long long conversations with 1slow370... That dude knows his sh1t! I have also seen his car dyno'd and ridden in it.
Let me dispel one thing... Do not raise your compression! It will net you very LITTLE power and only hamper your ability to find gas outside of pumping your own barrel of 100+ octane. Things you should do for an easy 450+ whp: 4.2l or 4.3l stroker with Stock compression Pistons Forged rods Dry sump oiling system or a semi dry system if you want A/C Built heads with JUN 282 cams Replace the intake manifold (upper and lower) with one like 1slow370 Run 3" throttle bodies from an 09+ maxima (talk to 1slow370) and a 3" cold intake Run headers 3" exhaust or Tomei Tune by Jon @ Z1 Bam 450+whp This is the route I would go and may end up going with my new Nismo...
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12-24-2014, 05:21 PM | #26 (permalink) |
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Also make sure the oil passages in the crank are designed for higher rpms. I have seen the GTM ones in person and the method they used was the most direct at higher rpms.
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12-26-2014, 09:15 PM | #27 (permalink) | |
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12-26-2014, 09:17 PM | #28 (permalink) | |
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12-26-2014, 10:43 PM | #29 (permalink) |
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Yes, he could have easily hit 400whp. The only thing he didn't do was get into the heads. He had a stage 0 long block which meant he only had upgraded rods and Pistons...
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