HO conversion for SO vs. HO block Reply #15 – December 29, 2006, 09:35:16 AM Quote from: Innes;120581And you have one up on the HO pistons your compression is up. If the chamber size is 64cc you will be approx 9.5.1 small chamber higher your compression and for every ½ point is an additional approx of 15hp.Trick Flow heads are 61cc... Quote Selected
HO conversion for SO vs. HO block Reply #16 – December 29, 2006, 05:35:20 PM Quote from: TurboCoupe50;120590Trick Flow heads are 61cc...well if you look at the 1st post I give a chart at the end I made up I had it straight and in line but this forum lined it up wrong but w/61cc your compression is approx 9.84/1 that’s very close to 10/1 but probably betty due to the oxygenated fuels and its almost 30 more hp just in compression. Quote Selected
HO conversion for SO vs. HO block Reply #17 – December 30, 2006, 07:19:17 AM Just curious does anyone know what the piston to deck measurement is on an E6 motor. Cause my compression #s on the first post is 0. Is that in the ballpark? Quote Selected
HO conversion for SO vs. HO block Reply #18 – December 30, 2006, 09:32:52 AM Quote from: Innes;120646well if you look at the 1st post I give a chart at the end I made up I had it straight and in line but this forum lined it up wrong but w/61cc your compression is approx 9.84/1 that’s very close to 10/1 but probably betty due to the oxygenated fuels and its almost 30 more hp just in compression.Dunno where you got your figures, but I'd bet they are a bit on the optimistic side... Maybe on a Free breathing, large cammed race engine compression is worth 30hp a point. But on a street engine with a moderate cam and full exhaust system, I'd guess maybe half that much... At any rate the Trick Flow heads are a perfect match up for the flattops in a fairly hot street engine... Quote Selected
HO conversion for SO vs. HO block Reply #19 – December 30, 2006, 10:27:18 AM Quote from: TurboCoupe50;120566Yup... Been running a set on a '86 GT short block for over seven years now...what camshaft are you running? Quote Selected
HO conversion for SO vs. HO block Reply #20 – December 30, 2006, 11:44:33 AM Quote from: 86elan;120767what camshaft are you running?Stage1 Trick Flow... Great street cam, a little rumpy but not too much... With good heads, intake and exhaust system It needs a 3000 stall and 3.73 gears to make the car move on the bottom end...Best in my full weight Bird is 13.11@105 on the motor and a 12.23@112 hitting it with a 80-90hp shot of juice... Would have easily gone 11s on the 150hp shot, but I didn't have tires to handle the hp... Quote Selected
HO conversion for SO vs. HO block Reply #21 – December 30, 2006, 02:14:48 PM I wonder if should have gotten a different stall with my e-303, it's a B&M 2400I guess the TFS stage 1 have a higher rpm range than the e cam Quote Selected
HO conversion for SO vs. HO block Reply #22 – December 30, 2006, 02:57:55 PM A 2400 is good with the "E", the Trick Flow has a idle and bottom end similar to the "B", but pulls harder on the top end. In fact back in '99 just by listening to it, everyone thought I had a "B" in the motor. Few people had ever seen or heard the TF cam back when... Quote Selected
HO conversion for SO vs. HO block Reply #23 – December 31, 2006, 08:04:38 AM Quote from: TurboCoupe50;120762Dunno where you got your figures, but I'd bet they are a bit on the optimistic side... Maybe on a Free breathing, large cammed race engine compression is worth 30hp a point. But on a street engine with a moderate cam and full exhaust system, I'd guess maybe half that much... At any rate the Trick Flow heads are a perfect match up for the flattops in a fairly hot street engine...It might be on the optimistic side but most engine builders will tell you compression does=HP and to be exact I got my figures from this book page.208 http://www.bentleypublishers.com/gallery.htm?code=GFM5&galleryId=79 not saying its 100% correct because I caught some differences in the info from the book. The book states for every ½ point above 9:1 in an OE style 5.0 is approx 15hp Quote Selected
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