How many horses do you think?
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Lead Driver
Joined: Mar 2008
Posts: 7,182
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From: Near Los Angeles
How many horses do you think?
I'm putting together a built 300, and was wondering how many horses it might have.
I kind of followed Clifford's build up, which would render 300 hp, but toned it down a bit in a few areas, since I'm wanting to save a bit on gas.
Instead of milling .060 off the head, and .030 off the block, to get 10:1 or more compression, I kept my compression at about 9:1. Also, I went with a milder cam, the Isky 256.
Although I did install sbc valves installed, 1.94 intakes, and 1.60 exhaust, along with a pro porting/unshrouding the valves.
Along with that I'm using the Offy DP intake, hedman header with 1 1/2" tubes into two 2 5/8". And an autolite 4100 tweaked by Pony Carbs, with a MSD ignition box, and a dS11 dizzy with TFI coil.
I've been guessing about 250 hp, but I'm sure there's guys on here who would know more than me. What do you think?
Hey, as long as it gets better than my tired 390 (eight in town!, and a big 10 on the freeway!!), then I'm happy.
I kind of followed Clifford's build up, which would render 300 hp, but toned it down a bit in a few areas, since I'm wanting to save a bit on gas.
Instead of milling .060 off the head, and .030 off the block, to get 10:1 or more compression, I kept my compression at about 9:1. Also, I went with a milder cam, the Isky 256.
Although I did install sbc valves installed, 1.94 intakes, and 1.60 exhaust, along with a pro porting/unshrouding the valves.
Along with that I'm using the Offy DP intake, hedman header with 1 1/2" tubes into two 2 5/8". And an autolite 4100 tweaked by Pony Carbs, with a MSD ignition box, and a dS11 dizzy with TFI coil.
I've been guessing about 250 hp, but I'm sure there's guys on here who would know more than me. What do you think?
Hey, as long as it gets better than my tired 390 (eight in town!, and a big 10 on the freeway!!), then I'm happy.
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
Fordsix Performance :: View topic - FIGURES
Wander through that thread...Lots of simulations run on DeskTop Dyno and you should be able to find a combo close to yours. Around five pages worth of reading and I do recall the 256 used in a few different combination's but I don't recall the specifics. Is that the carb with the annular discharge nozzles? It should deliver the goods quite well.
BTW, use stock EFI plugs with the gap opened up to about .050ish. Only a few cents difference in the cost. With that ignition it should be good to go.
Wander through that thread...Lots of simulations run on DeskTop Dyno and you should be able to find a combo close to yours. Around five pages worth of reading and I do recall the 256 used in a few different combination's but I don't recall the specifics. Is that the carb with the annular discharge nozzles? It should deliver the goods quite well.
BTW, use stock EFI plugs with the gap opened up to about .050ish. Only a few cents difference in the cost. With that ignition it should be good to go.
Elder User
Joined: Oct 2006
Posts: 552
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I have a desktop dyno of my car and an actual dyno of my car and the differences are pretty silly. It was fairly close on the high end (3k to 5500) but it was way, way generous with the low end. In conclusion, i would take even the most highly refined DDs with a grain of salt. the amount of time needed to make a good DD simulation is time you could spend making the money to pay for an actual dyno.
if cliffords build is 300 and youre a little bit milder, then yeah, 250 sounds reasonable. I take it thats flywheel. 20% driveline loss would yield 200 rwhp. Not bad i suppose.
if cliffords build is 300 and youre a little bit milder, then yeah, 250 sounds reasonable. I take it thats flywheel. 20% driveline loss would yield 200 rwhp. Not bad i suppose.
Elder User
Joined: Jan 2009
Posts: 774
Likes: 1
From: East Tennessee
Yeah, and how much milder is the cam? Do you have the specs on your cam you chose vs. the other cam for the 300hp engine? And, does the 300hp engine have a dyno to back it up? It kind of helps to compare.
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