How to decide on which valve spring

[91CoupeMike]

Good choice

Thanks for all of your help, if I knew of a place I could go and sit in a class and listen to someone talk about racing engine dynamics, I would.

[Mach1]

Thanks for all of your help, if I knew of a place I could go and sit in a class and listen to someone talk about racing engine dynamics, I would.

you and me both

[greenbullitt]

stock lifters will not control k800s, ive experienced that one...they were new lifters at that. kmotion makes a great spring

[jyro]

I guess it depends on the spring setup

stock lifters will not control k800s, ive experienced that one...they were new lifters at that. kmotion makes a great spring

There all I have run for the last 8 years with stock used lifters and tfs/r heads on 4 different motors, 4 different cams, all under .600 --- AMS-B4 Crane 2031 and another Crane cam that was rated to 7200 and the one I run now that was a turbo cam lunati 55112

[91CoupeMike]

All this looking and deciding has got me looking at shp short blocks.

I wonder if they'd build me a 4.125 bore with the 3 inch stroke, 5.3 liter.

Would reduced piston speed make it stronger, or just last longer? It would see more rpm to get desired power. A 363 may be the better option though.

[broke again]

All this looking and deciding has got me looking at shp short blocks.

I wonder if they'd build me a 4.125 bore with the 3 inch stroke, 5.3 liter.

Would reduced piston speed make it stronger, or just last longer? It would see more rpm to get desired power. A 363 may be the better option though.

are you really serious with the 4.125 bore and 3" stroke? come on now... why do you always try to swim upriver? i love that you are all about fox body but damn. listen to some of the guys on here.

[91CoupeMike]

are you really serious with the 4.125 bore and 3" stroke? come on now... why do you always try to swim upriver? i love that you are all about fox body but damn. listen to some of the guys on here.

Because the new copo lsx 5.3 is a 4.125 x 3 with a blower on it.

Why not do it with a ford motor?

Listen to them, I am listening! I'm discussing ideas..

Edit: and I was referring to piston speed when I was asking if a shorter stroke would be stronger.

[greenbullitt]

There all I have run for the last 8 years with stock used lifters and tfs/r heads on 4 different motors, 4 different cams, all under .600 --- AMS-B4 Crane 2031 and another Crane cam that was rated to 7200 and the one I run now that was a turbo cam lunati 55112

interesting, I had them on a set of new motorsports and they didn't control for shit, very noisy.

[broke again]

Because the new copo lsx 5.3 is a 4.125 x 3 with a blower on it.

Why not do it with a ford motor?

Listen to them, I am listening! I'm discussing ideas..

Edit: and I was referring to piston speed when I was asking if a shorter stroke would be stronger.

well there is your answer. put a copo 5.3 with a blower in it. if not dont even make the comparision between the two builds.

[jyro]

My setup

interesting, I had them on a set of new motorsports and they didn't control for shit, very noisy.

I left it to David at Wells to set these k800 springs up on my heads, we ended up with 140 or so at the seat. My valves are .1 or .2 longer than the stock tfs valves so I'm sure it gave the option of spring height setup. I always adjust my hyd roller with near zero preload. As close to loose as possible without actually being loose and clicking. If I adjust it running, as soon as it stops clicking, I stop, no 1/4 turn or whatever extra.

[91CoupeMike]

well there is your answer. put a copo 5.3 with a blower in it. if not dont even make the comparision between the two builds.

Sigh. I was asking a question about piston speed.

Second time I've stated this.

[jyro]

all the ford sbf options are hi-dollar

Because the new copo lsx 5.3 is a 4.125 x 3 with a blower on it. Why not do it with a ford motor? Edit: and I was referring to piston speed when I was asking if a shorter stroke would be stronger.

If you have a unlimited budget, By all means get one of these

http://www.cnc-motorsports.com/engine-block-accessories/engine-blocks/dart-shp-block-31365235351-ford-351-4-125-bore.html

it's out of my price range

or this http://dallas.craigslist.org/dal/pts/4037336102.html

[jyro]

If you have a unlimited budget, By all means get one of these

http://www.cnc-motorsports.com/engine-block-accessories/engine-blocks/dart-shp-block-31365235351-ford-351-4-125-bore.html

it's out of my price range

as for your piston speed, buy this software and you can build any engine combo and see the differences.

http://performancetrends.com/Engine-Analyzer.htm

[jyro]

piston speed conversation

Sigh. I was asking a question about piston speed.

Second time I've stated this.

http://ls1tech.com/forums/advanced-engineering-tech/501303-piston-speed-displacment-vs-hp.html

[91CoupeMike]

If you have a unlimited budget, By all means get one of these

http://www.cnc-motorsports.com/engine-block-accessories/engine-blocks/dart-shp-block-31365235351-ford-351-4-125-bore.html

it's out of my price range

I want an shp 4.125 8.2 deck. Any reason for going tall deck besides cubes?