 How To Get 500+ More RPM, Without Changing Cam |
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| motorvated |
 Jan 15 2019, 05:50 PM
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Member  Group: Members Posts: 279 Joined: 13-February 13 From: Colorado Member No.: 15,519 Region Association: Rocky Mountains  |
2.0 Liter Four. Doing a top end refresh and not planning on splitting the cases or changing the cam. Would stiffer valve springs and beefier pushrods get me there. I'm a little confused when looking at aftermarket springs, as the European Motorworks Single HD springs are rated at 135 psi seat pressure, and stock springs are rated at about 175 psi. Also thinking that chromoly pushrods set at zero clearance cold don't let the valves open fully when hot due to the lower expansion of the pushrod, plus they are a lot heavier than aluminum pushrods. So what can I use to get those elusive extra 500+ rpm? My old stock 1.8 floated valves up near 6,000, which wasn't bad, but I'd like a little more with the 2.0 liter. I'm racing the car in Vintage. Any suggestions.
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Posts in this topic
motorvated How To Get 500+ More RPM Jan 15 2019, 05:50 PM
Dave_Darling Stiffer springs should get you there, but it won... Jan 15 2019, 06:07 PM
wndsrfr
Stiffer springs should get you there, but it won... Jan 15 2019, 07:55 PM motorvated
Stiffer springs should get you there, but it won... Jan 15 2019, 08:15 PM
pvollma
You guys are absolutely right. I guess if the tor... Jan 16 2019, 09:16 PM marksteinhilber
Stiffer springs should get you there, but it won... Jan 16 2019, 11:54 AM GregAmy
I agree that changing rear tire diameter can be a... Jan 16 2019, 12:50 PM ConeDodger
Stiffer springs should get you there, but it won... Jan 15 2019, 09:26 PM GregAmy +3. Only value in more RPM witthout moving/improvi... Jan 15 2019, 08:04 PM rhodyguy You want to drive around at 6500rpm? Jan 15 2019, 08:09 PM Mark Henry Heavier springs also take horsepower to run.
I ag... Jan 15 2019, 09:13 PM tejon007 Take a look at the whole picture...racing takes th... Jan 16 2019, 11:51 AM motorvated I'm running 235 50 15's Toyo Proxes on the... Jan 16 2019, 12:24 PM Mark Henry
So a couple of quick questions about the 2.0 li... Jan 16 2019, 01:39 PM Bleyseng I used to run up to 6500rpms for AXing.
HD valve... Jan 16 2019, 12:52 PM Dave_Darling To remove the lifters, use a magnet. You'll h... Jan 16 2019, 03:03 PM colingreene If you are going to race in vintage why would you ... Jan 16 2019, 06:50 PM Rand Just turbo it Jan 16 2019, 08:24 PM  |
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