S2000 Under The Hood S2000 Technical and Mechanical discussions.

How much boost can I run on pump gas?

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Old 12-06-2004, 12:08 AM
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Default How much boost can I run on pump gas?

2 pulley sizes, what should I order, 1 for street gas, one for 100 octane, already have a 9lb pulley. I was thinking about a 12lb and 15lb.

I have an Alaniz Competition head servicing and I'm continuing with his short block build service that will bring the compression down to 9-1. The car has a Comptech blower kit on it, and I'm probably going to upgrade the compressor from the Novi-1000 to the Novi-2000. In talking with Paxton, the 1000 is maxed out at 12lbs of boost, the 2000 will handle 29lbs, ie plenty of room for growth.

I have a Tech2 9lb pulley, but I'm also putting an order in to have higher boost pulley's made with ASP racing. It's a street car, so I'll be running pump gas, California dirt, ie 91 octane. Does anyone with experience know what the upper limit boost pulley that I can run is on pump gas? 12lbs? 15lbs? 18lbs?

I'd like to order the highest I can get expect to work cosher on pump gas, and then another one, for the dyno and/or track running somewhere around 100 octane.

Setup has an aftercooler upgrade, AEM EMS, RC 750cc injectors, AEM fuel pressure regulator. Ignition system is still stock, I've read hear for turbos at least that anything above 15lbs of boost exceeds what the stock system can support. Should I upgrade from stock here too?

I'm not concerned about a dyno hp number, more about a reliable, strong motor that can get the most out of every day gas.

Based on talking with Paxton and reading about the Novi 2000 blower running on Mustangs, I should expect more lag than the Novi-1000, and next to a turbo setup, I'll have system that takes the term lag to a new level. Again, that doesn't really matter to me, I'm running nitrous if I need to fill in the void for power in the lower RPM range on occasion.

I'm not approaching this setup to be hp greedy or competitive with other folks out there, more about what's doable and able to recover the power lost by reducing the compression.
Old 12-06-2004, 01:11 AM
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Im confused, do you want power or reliability? Can't have both on a everyday driver car on pump gas.
Old 12-06-2004, 01:16 AM
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Originally Posted by revhi,Dec 6 2004, 02:11 AM
Im confused, do you want power or reliability? Can't have both on a everyday driver car on pump gas.
Reliable power, making most of pump gas. Bottom end is being build and compression lowered 2 points, so I'm confident the engine will be a strong base. It'll also be tuned throughly so reliability should be a mute point, as much as that can be said with an AEM EMS and capable tuner.
Old 12-06-2004, 01:34 AM
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You can probably run as much boost as you want as long as it gets enough fuel.

I dont think you will have a lag problem with pistons or a larger blower. Say you ran 20 psi. It would start boosting at a lower rpm than say the stock 5.5psi. The lag wouldnt be felt.

Isnt nitrous for higher rpm use and for higher speeds?
Old 12-06-2004, 12:52 PM
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Originally Posted by yellowknockers,Dec 6 2004, 02:16 AM
Reliable power, making most of pump gas. Bottom end is being build and compression lowered 2 points, so I'm confident the engine will be a strong base. It'll also be tuned throughly so reliability should be a mute point, as much as that can be said with an AEM EMS and capable tuner.
reliable and power and high boost arent things that go together on the f20c.... If you want to see reliability +high boost the best would be a 2jz-gte engine (supra tt)
Old 12-06-2004, 12:55 PM
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hp and f20c don't go together.
Old 12-06-2004, 12:56 PM
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Originally Posted by alexf20c,Dec 6 2004, 01:55 PM
hp and f20c don't go together.
my sentiments exactly....
Old 12-06-2004, 01:14 PM
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...
Old 12-06-2004, 01:42 PM
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what does the build up consists of for the short block? and how much powr are you looking for? and most importantly how much are you willing to spend? the S is capable but it does come with a higher price than most imports.
Old 12-06-2004, 01:59 PM
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Originally Posted by yellowknockers,Dec 6 2004, 02:14 PM
...
what are you trying to say in this post? please specify.....


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