dyno desktop/ simulator
Thread Starter
Heel & Toe
Joined: Nov 2019
Posts: 19
Likes: 0
From: South Carolina
dyno desktop/ simulator
anybody with a dyno simulator help!
i have a 350 bored .30 over
comp cam 280h with aluminum heads and edelbrock performer intake would love to know h.p. and tq numbers on this
BORE 4.030
STROKE 3.48
230 duration
.480 lift
110 lsa
2.02 exhaust 1.65 intake valves
edelbrock performer eps intake
1 inch spacer
650 cfm double pumper holley
i have a 350 bored .30 over
comp cam 280h with aluminum heads and edelbrock performer intake would love to know h.p. and tq numbers on this
BORE 4.030
STROKE 3.48
230 duration
.480 lift
110 lsa
2.02 exhaust 1.65 intake valves
edelbrock performer eps intake
1 inch spacer
650 cfm double pumper holley
Thread Starter
Heel & Toe
Joined: Nov 2019
Posts: 19
Likes: 0
From: South Carolina
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Had a combo very similar
T350 cheap 2800 stall
2xx to the ground just under 3xx tq on an old Clayton water dyno. Probably todays 300 rwhp car lowish 14s?
10:1 PAW shorty Dart 215 300-36 holley 280 type cam (SSI regrind, Isky 280 ran a lil better) typical headers etc.
T350 cheap 2800 stall
2xx to the ground just under 3xx tq on an old Clayton water dyno. Probably todays 300 rwhp car lowish 14s?
10:1 PAW shorty Dart 215 300-36 holley 280 type cam (SSI regrind, Isky 280 ran a lil better) typical headers etc.
Le Mans Master
Joined: Oct 2007
Posts: 7,445
Likes: 971
From: Tennessee/Rhode Island
That simulation looks about right at 370 Gross HP and about 325 RWHP with what you have...Great Dart Heads but a little too big for a 355 at 200 CC and a strong compression at 11:1. That flat tappet cam with .480 lift is absolutely killing the power potential. A roller cam with .525-.550 lift would give you about 425-450 Gross HP.....
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Also figure about 360 with old heads, lil better with more modern. I honestly felt next to no difference with stock 462....bigger int valves than 200 cc Darts only way up top. Not worth it. still ran strong and smoked tires.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
The Jebby meter has this combo closer to 380-390.........the cam is ok but the carb and manifold are too small for the heads potential.....needs a 750 and RPM intake or Victor Jr./Team G.
The 280H Magnum is a very old but trusty grind......and it works best with 1.6 rockers for a total lift of .512.......the carb and manifold that I just mentioned would push this into the 410 range.
I am not a simulator......but I play one on TV
Jebby
The 280H Magnum is a very old but trusty grind......and it works best with 1.6 rockers for a total lift of .512.......the carb and manifold that I just mentioned would push this into the 410 range.
I am not a simulator......but I play one on TV
Jebby
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Having build a half dozen 355's with Dart 180 heads......I am going to have to lean in this direction......it will have a broader torque curve.
Yes.....the 7101 Performer RPM is a high rise dual plane....the EPS is a touch higher than a 2101 Performer but flows a little better.....
The 7501 RPM Air Gap is even better upstairs than a RPM as it has the divider cut down a bit. A 750 Street HP would be nice on this.
1.6 rockers on the 280H and you got yourself a 410-415 horse engine......
I would consider the mentioned Trick Flow DHC heads as well....but I am partial to Dart's for a lot of reasons......
Jebby
Yes.....the 7101 Performer RPM is a high rise dual plane....the EPS is a touch higher than a 2101 Performer but flows a little better.....
The 7501 RPM Air Gap is even better upstairs than a RPM as it has the divider cut down a bit. A 750 Street HP would be nice on this.
1.6 rockers on the 280H and you got yourself a 410-415 horse engine......
I would consider the mentioned Trick Flow DHC heads as well....but I am partial to Dart's for a lot of reasons......
Jebby
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
If the O.P. is hitting the drag strip all the time, looking to cut a couple tenths, then it would be worth swapping $1500-$2,000 parts. But looking at post one, this is a street warrior and that kind of money could be spent more wisely elsewhere. Keep the heads. Its not worth fretting over 20 CFMs.
Thread Starter
Heel & Toe
Joined: Nov 2019
Posts: 19
Likes: 0
From: South Carolina
alright thanks for all the advice i’m gonna swap the 650 out for a bigger carb and then swap the intake out trying to get a good street car that’s got enough power to run good passes at the strip maybe 12s
Le Mans Master
Joined: Oct 2007
Posts: 7,445
Likes: 971
From: Tennessee/Rhode Island
X2 on the 650 CFM carb! That carb size is perfect for a 355 and going bigger CFM will do nothing for power on your particular motor. Tuned properly, the 355 will run great with that 650 carb.
As for the intake, the Edelbrock performer is a good intake and switching to a Performer RPM will net you about 5-7 more HP over the Performer intake, 10 HP, if you are absolutely optimistic. Save your money and put the extra cash into 1 5/8-1 3/4 inch Long Tube headers and proper free flowing 2.5 inch dual exhaust.
The real power for your combo is in the cam lift and investing in 1.6 rockers is by far the biggest bang for the buck if you are looking for more HP. I would do the 1.6 rockers first, exhaust headers/pipes second and see how it goes from there.....
If you want to drop $1,500-2,000 ( I would not at your stage), invest in a howards roller retrofit cam (.525-.550 lift, duration 225 there abouts, LSA 110, operating range 1,500-5,800 RPM) with those heads and compression and your 355 would scream...... with good low end power, very strong mid range torque and very good high RPM HP.....
As for the intake, the Edelbrock performer is a good intake and switching to a Performer RPM will net you about 5-7 more HP over the Performer intake, 10 HP, if you are absolutely optimistic. Save your money and put the extra cash into 1 5/8-1 3/4 inch Long Tube headers and proper free flowing 2.5 inch dual exhaust.
The real power for your combo is in the cam lift and investing in 1.6 rockers is by far the biggest bang for the buck if you are looking for more HP. I would do the 1.6 rockers first, exhaust headers/pipes second and see how it goes from there.....
If you want to drop $1,500-2,000 ( I would not at your stage), invest in a howards roller retrofit cam (.525-.550 lift, duration 225 there abouts, LSA 110, operating range 1,500-5,800 RPM) with those heads and compression and your 355 would scream...... with good low end power, very strong mid range torque and very good high RPM HP.....
Last edited by jb78L-82; Jan 2, 2020 at 05:45 AM.
Instructor
Joined: Aug 2017
Posts: 198
Likes: 90
From: Murphy, Tx.
Keeping your current cam and heads, I would switch to a RPM intake and a 750 vacuum secondary carb. Remember, with the dual plane the carb's CFM is effectively cut in half. That 650 would be plenty big on a single plane intake but with the dual plane you can go bigger, and with a vacuum secondary you almost can't over carb an engine. Take the time to properly tune the opening rate of the secondaries. Add the 1.6 rockers and a good ignition system and you should have a screamer.