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Author Topic:   help finding more HP
Dusty5
Dirt Roller

Total posts: 24
posted December 17, 2005 11:33 PM  
i am running a 355 9 to 1 comp. 76 cc heads running in street stock class. can't do any head work. must run stock rods and crank. piston must stay in block. almost every thing has to be stock. just need some ideas on jpe to get more horse power out of it.

ss99
Dirt Maniac

Total posts: 128
posted December 18, 2005 06:39 AM  
Do you have to run those heads? Is there a combustion chamber CC rule?

Get the most compression you can within the rules without compromising the piston to deck clearance.

Select the right cam.

Use a dyno session to maximize things like timing, jetting, and valve lash.

Use the lightest parts you can afford in the motor.

Most important - work on chassis setup.

johder
Dirt Maniac

Total posts: 184
posted December 18, 2005 07:23 AM  
file fit rings will give you another 5-10 hp.

DCI racing
Dirt Roller

Total posts: 13
posted December 18, 2005 01:52 PM  
we got street stocks that will keep up with sportsmans, they make thin head gaskets. will raise comp. if they don't have a head cc rule at least get 64cc heads. lock your dist. total adv. keep your plug gap at 35. if your running an automanic lose it get a 3 speed. buy a good carb. i spose 2barrel one of my frends had good luck with a jet, put in lower gears get your rpms up to 6000 to 6500, that will make a under powered motor wake up.

johder
Dirt Maniac

Total posts: 184
posted December 18, 2005 02:08 PM  
dci *** are you talking about. if your track has racers that know what they are talking about there is no way a stock car will keep up with a late model. 64cc heads wont raise compression....49cc darts will or 58cc heads will....if you run an auto have the TIGHTEST torque converter you can get....but you are RIGHT there...run a manual....and i dont know how cuttin gear ratio's will make a motor wake up...i suggest go do a line of coke and rethink what you wrote fuzz

DCI racing
Dirt Roller

Total posts: 13
posted December 18, 2005 02:41 PM  
he said he was running 76cc heads, and i didn't say that they would keep up with late models, my mistake at our track sportsmans are full body cars like street stock with unlimted cu alot of 406s and 383s on holley 2barrels and run weight jacks. as far as gears i seen it at least two times this year, guys running 5.14 or 5.29 running mid pack and going down to 5.57 or 5.67 and kicking **** , without any other changes. as far as your comments about me, was that called for!!, just trying to help the guy out, thought that is what this forum is for.

P.S.- This is Ms. DCI he may not be right all the time, but over 21 years of drags and blown Keith Black Hemi's it ain't very **** often and he'll admit it when he is. Keep your drug comments to yourself and focus on helping this fellar out!! The last street stock we helped went from the back of the pack to 2 feature wins and consistant top 5's!! Enuf said!!

[This message has been edited by DCI racing (edited December 18, 2005).]

Eljojo
Dirt Forum Champ
Total posts: 1002
posted December 18, 2005 03:43 PM  
Cheat!
Ok....push the rules a little...mill those heads and put good valves in 'em. Max out your cam choices. Sometimes that means spending for a custom grind. Do your homework on the carb, intake, and exhaust system.
Run on good tires. Don't even think about stock mount shocks that don't say Bilstien or QA-1 on them. Work on your set up and driving skills.Weigh the car often and keep notes. Change everything at least once during the season---bite #'s, rear weight, left side weight, weight placement, wheel offsets, gears....on and on-one thing at a time.

MrHP1
Dirt Roller

Total posts: 24
posted December 18, 2005 03:45 PM  
PM me your rules and I'll tell you how to make more horsepower. Ya gotta read between the lines.

Dusty5
Dirt Roller

Total posts: 24
posted December 18, 2005 05:43 PM  
MrHP1 as soon as we get them i will thanks for the help.

racer17j
Dirt Forum Champ
Total posts: 5507
posted December 18, 2005 06:07 PM  
i think johder ****ed the boss lady off

avenger 11
Dirt Forum Racer

Total posts: 91
posted December 18, 2005 09:15 PM  
He didn't say anything about cutting gear ratio anyway,he said to go to a lower gear,which in turn would turn more rpms.DCI was right.

Normal Sullivan
Dirt Forum Racer

Total posts: 84
posted December 18, 2005 11:54 PM  
Being right don't cut it around here...

Seriously, If you're stuck with 9:1 per the rules, (and they actually check) there's still a few tricks you can try. Back-cut valves increase flow without touching the ports, gearing your car to run where your engine makes the most power (no matter which way you have to move your gear ratio), more or less "cam", lots of things.

Anyway, whoever helps is going to need to know what rpm you're running, what size track, what your car weighs, and as others have said, what rules you run under.

Lastly, If you replace 76cc heads with 64cc heads how exactly will it not raise compression?

Koolaid
Dirt Maniac

Total posts: 115
posted December 19, 2005 06:23 AM  
quote:
Originally posted by johder:
dci *** are you talking about. if your track has racers that know what they are talking about there is no way a stock car will keep up with a late model. 64cc heads wont raise compression....49cc darts will or 58cc heads will....if you run an auto have the TIGHTEST torque converter you can get....but you are RIGHT there...run a manual....and i dont know how cuttin gear ratio's will make a motor wake up...i suggest go do a line of coke and rethink what you wrote fuzz


64cc heads will raise compression over 76cc heads. It doesn't matter if a 49cc is a Dart or not - a 49cc head from any manufacturer will bring the compression to the same amount (displacement is displacement). Using proper gear ratios is an effective tool in setting up a race car and if you aren't getting the engine into the power band one way or the other you need to make a change.

We're all here to help each other and make ourselves and other racers better - you can politely question someones post without accusing them of being a coke-head.

DCI racing
Dirt Roller

Total posts: 13
posted December 19, 2005 07:32 AM  
if you go to any comp calc. less ccs in the head works the same as having dome on the piston.

PEwaste
Dirt Full Roller

Total posts: 67
posted December 19, 2005 10:51 AM  
Don't listen to dipweed Johder...

The main thing is going to be camshaft and head selection.

For that 9-1 Deal, find the lightest piston you can that is gas ported. Use the thin metric rings for a good cylinder seal and less drag.
On top of that, if you don't have a CC limit on the heads but must stay within 9-1 Compression, order those pistons with a reverse dome that'll push 8.8-1 with a 64cc Head. Find a set of Humps and put 2.02/1.6 Valves in them with a set of .600 Lift Springs from JR Motorsports or Midwest MOtorsports.

Next will be camshaft. Call a custom cam grinder, and have them custom taylor a cam to your track and your driving style. I suggest staying away from Comp, in the past they haven't impressed me any.

With that combination of a 64cc Hump with 2.02/1.6 Valves, a 5.7 Rod and Custom cut cam you shouldn't be shy of any HP.

DCI racing
Dirt Roller

Total posts: 13
posted December 19, 2005 04:18 PM  
agree with pe waste try bullet cams small cam grinder, used to be ultrdyne, at 662-893-5670. they will hook you up ask about adv. 4 to 5 dreg. that will make a lot of power

johder
Dirt Maniac

Total posts: 184
posted December 19, 2005 05:52 PM  
johder is no dipweed! sorry for the derogatory comments....i been watching football all day had about 12 beers was ****ed off...and i read that post and got perterbed.

nine finger
Dirt Forum Racer

Total posts: 97
posted December 19, 2005 06:26 PM  
we dont call em dipweeds we call em dimwits around here. Its the little things that add up.oil pump & pressure run stock pump. small journal crank will help.even a double row timing chain takes more power to turn. I have a buddy who couldnt build or tune a motor for anything yet he is a master when it comes to chassies. i have seen him out corner a many fine engines and take the money.build a good dependable motor and spend the rest of the winter working on your chassie. ps. this is the first year i am taking my own advice never liked studying on chassies but that is what it takes to win even in pure streets now.

DCI racing
Dirt Roller

Total posts: 13
posted December 19, 2005 06:37 PM  
try street stock doctor. down load for about $30 a lot of good chassis setups and little tricks still legal

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