427 SBF

89 Fox 427 said:
I would expect my really amazing cam guy to be more in the .629/.636 with 236/242 ish and maybe 108-110 for this boring little street car. My heads flow well but not amazing (promaxx 210cc/56cc) and i figure I'll never know the true hp number because I won't wind it up enough to know (and the dual plane will castrate the top end which I'm ok with). At least I can say it's got more in it.

I just made those cam numbers up to try and be part of the conversation, please refrain from shitting on me
Click to expand...
I find it interesting that the street car cam has so much more duration at .050 than my race car cam............
I guess they did that to bleed-off cylinder pressure to keep the cylinder pressure in-check for super unleaded.
All I can say is that engine is done by 7200, my engine is happy to 8000+.
A lot of voodoo with cams and convertors............ ;)
 
Mike Beck said:
I find it interesting that the street car cam has so much more duration at .050 than my race car cam............
I guess they did that to bleed-off cylinder pressure to keep the cylinder pressure in-check for super unleaded.
All I can say is that engine is done by 7200, my engine is happy to 8000+.
A lot of voodoo with cams and convertors............ ;)
Click to expand...
I believe so. I was running 12.8:1 on pump 93 with my 268/276 cam.
But lots more to it than that.
 
Watched a video yesterday and with a Hydraulic roller they didn't lubricate the lobes when installing the cam because the lifters would "skate"

Also, is it still common practice to soak hyd roller lifters before install
 
89 Fox 427 said:
Watched a video yesterday and with a Hydraulic roller they didn't lubricate the lobes when installing the cam because the lifters would "skate"
Click to expand...

Sounds odd to me.
Is the idea they're stiffer when new and don't rotate as easily?

89 Fox 427 said:
Also, is it still common practice to soak hyd roller lifters before install
Click to expand...

I'd follow what the manufacturer says.
Isky specifically states don't do it for the bushed ones I was looking at a few weeks ago.
 
Steve439 said:
Sounds odd to me.
Is the idea they're stiffer when new and don't rotate as easily?



I'd follow what the manufacturer says.
Isky specifically states don't do it for the bushed ones I was looking at a few weeks ago.
Click to expand...
They say why
 
89 Fox 427 said:
Watched a video yesterday and with a Hydraulic roller they didn't lubricate the lobes when installing the cam because the lifters would "skate"

Also, is it still common practice to soak hyd roller lifters before install
Click to expand...
Soaking can only help. The "skating" is BS. Might happen on a bushed lifter or a bearing failure,but not on good new lifters.
 
Steve439 said:
Now I can't find the instructions...
Basically they say the lube they supply is the correct for break-in and they don't want people messing with it.
No cleaning, no soaking,...
Click to expand...
Ok, so they do want/supply a break in oil.👍
20 years ago if you got roller rockers or lifters there was no break in procedure, now they come with warnings that a break in oil must be used. Oil ain't what it used to be imo
 
For my reference later. Heads need sealant on rocker studs (7/16 upgrade) torque to 45lb ft
 
Who wants to shit on my idea to buy a 750 carb... that damn engine masters
 
89 Fox 427 said:
Who wants to shit on my idea to buy a 750 carb... that damn engine masters
Click to expand...

Earlier today I was reading some links from a car email I get.

The article talked about how the Boss 429 Mustangs were crippled by a 735, which was smaller than the carb on the Boss 302.
 
It just occurred to me that the email is still in my "trash" folder.
The pertinent quote:

That giant, functional hood scoop isn’t just for show; it feeds air to the beastly Boss 429 V8 underneath. This engine came factory-equipped with an aluminum intake manifold, a small Holley 735 CFM four-barrel carburetor, tough forged steel internals, and four-bolt main caps.

The Boss 429 was somewhat under-developed for street use. The carb was actually smaller than the one used on the Boss 302 engine. It was rated at 375 horsepower; actual horsepower was around 420.
Click to expand...

www.streetmusclemag.com

Rare Original 1969 Boss 429 Heads to Mecum Tulsa This June

This original 1969 Ford Mustang Boss 429 (KK2011, Candy Apple Red) built for NASCAR homologation hits the Mecum Tulsa auction on June 7.
www.streetmusclemag.com www.streetmusclemag.com
 
Steve439 said:
Earlier today I was reading some links from a car email I get.

The article talked about how the Boss 429 Mustangs were crippled by a 735, which was smaller than the carb on the Boss 302.
Click to expand...

Those fuckers had a 750 on a 598ci bbc with the rpm dual plane. 715ft lbs basically off idle with a small cam.

.552/.555
230/236
110lsa

Would have made a great tow rig if you hate gas mileage
 
Do oil pan bolts or intake bolts need to be grade 8? Id rather use socket cap bolts than hex bolts for oil pan, and my old intake bolts don't appear to be grade 8
 
You must log in or register to reply here.
Back
Top