Thread: 350 Performance

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My dad wants to get a little over 300 HP out of his 350 in his '72 C10. We got a dyno program ( Dyno 2000 ) and by using stock configurations, with 8.5:1 comp ( my guess of what it is due to the Smog stuff for '72- up ), and with an auto calculated valve lift and valve size, 750 CFM carb ( has a q jet ) it comes out at 190 HP, which looking at the 9.00 comp 1969 350 rated at 255 HP, seems resonable. What are some good things to do W/O a compleate rebuild ( top end rebuild would be acceptable but nothing more ). I figured a set of 64cc heads and a mild cam w/ a set of headders, that seems to do OK on the dyno program which says it is accurate within 7%. Is a electric water pump recomended for street use? My dad saw a electric water pump that is ok to use for street use and it says it frees up 15 horse, I told him I would recomend agenst it but he still thinks it is a good idea, especially being that 15 horse would be eaten up by the extra load on the alt, and having to get an electronic fan because a mech wouldn't work. any suggestions? Thanks in advance

Originally posted by Matt167
My dad wants to get a little over 300 HP out of his 350 in his '72 C10. We got a dyno program ( Dyno 2000 ) and by using stock configurations, with 8.5:1 comp ( my guess of what it is due to the Smog stuff for '72- up ), and with an auto calculated valve lift and valve size, 750 CFM carb ( has a q jet ) it comes out at 190 HP, which looking at the 9.00 comp 1969 350 rated at 255 HP, seems resonable. What are some good things to do W/O a compleate rebuild ( top end rebuild would be acceptable but nothing more ). I figured a set of 64cc heads and a mild cam w/ a set of headders, that seems to do OK on the dyno program which says it is accurate within 7%. Is a electric water pump recomended for street use? My dad saw a electric water pump that is ok to use for street use and it says it frees up 15 horse, I told him I would recomend agenst it but he still thinks it is a good idea, especially being that 15 horse would be eaten up by the extra load on the alt, and having to get an electronic fan because a mech wouldn't work. any suggestions? Thanks in advance

I.M.O.,AN ELECTRIC WATER PUMP IS ONLY GOOD FOR DRAG RACING.

Originally posted by erik erikson
I.M.O.,AN ELECTRIC WATER PUMP IS ONLY GOOD FOR DRAG RACING.

that's basicly what I told him

Originally posted by Matt167
that's basicly what I told him

I THINK A STOCK WATER PUMP WOULD WORK FINE.

This one may be what your dad is thinking about and will work on a street motor if you don't mind shelling out 360 bucks for a pump. It actually draws only 9-11 amps. I found out about this only recently on another forum. As all of you know, I've been dead set against electric pumps, but this new technology from Meziere has turned my thinking around. I won't use one, but I will list the source for those who want to.
http://store.summitracing.com/defaul...h.asp&x=27&y=4
Click 300 Series.

Originally posted by techinspector1
This one may be what your dad is thinking about and will work on a street motor if you don't mind shelling out 360 bucks for a pump. It actually draws only 9-11 amps. I found out about this only recently on another forum. As all of you know, I've been dead set against electric pumps, but this new technology from Meziere has turned my thinking around. I won't use one, but I will list the source for those who want to.
http://store.summitracing.com/defaul...h.asp&x=27&y=4
Click 300 Series.

That is an awsome pump, I have first hand experience with it on the street when it first came out. I sold it a while back and to my knowledge it's still running fine...

360 bucks is a heck of a lot when compared to the price of a good clutch fan!!!!! I've never tried it on a dyno, but I seriously doubt it takes 15 horse to turn a water pump and fan........ JMO

Originally posted by Dave Severson
15 horse to turn a water pump and fan........ JMO

My guess is that the 15hp number is at really high rpm, where very few street engines run. I would also think that the power required to run the fan/pump is exponential to rpm, so there would be a much lighter load at normal rpm's, and probably very little from stop to the peak power band.

An d if you change to an electric fan, but keep the stock waterpump, I guess the waterpump would need even less horsepower?