I feel bad, Diablo put all that effort into his truck and it makes like 5 horsepower...

The man that OWNS the motor says he doesn't think his makes the power claimed. HE also says it doesn't run the mph it should for the claimed power........so you two should take your complaints up with him.

As far as mph.......yep Billy, that is pretty much settled. X weight, with X HP should run X mph, provided the converter is not slipping some stupid amount, or it doesn't have the frontal area of a Prevost. I think everyone.......well I thought everyone pretty much knew that

Ok cool...
So..if it weighs X, with X hp, and doesn't run X mph, we just automatically throw our hands in the air and agree the hp number is wrong? Why diagnose a possible problem? Let's just all agree the engine builder ripped us off.

The man that owns the motor doesn't think his makes the power claimed, is that based on his racing experience or because he's tired of getting beat up on the internet?

BTW we race a Prevost...it eats horsepower.

Goodwin Race Engines...I apologize for stepping all over the OP

MoparBilly: All I can say is "WOW"

Good Lord...............I give up. You guys twist anything anyone has to say in an attempt to get your point across. Yep, I am sure 499 made ONE pass and said "damn, it's down on power, I got ripped off"..........I am sure that's exactly how it happened........I'm out, argue amongst yourselves and keep racing them dynos.

You want to know about 499s experience........why in the hell are you asking me.......ask HIM. But it appears he has a tube chassis early Barracuda with a damned expensive motor in it. Doubt it's his first day

Guilty as charged. But I'm pretty sure I took that one straight out of the Monte Smith handbook of internet forum debating. (my copy is nearly worn out)

Now is that feigned exasperation and disgust to make me out to be the overbearing dullard, or is it real? I'm not always sure.

I was trying to get a point across, I was not attempting to get under anyone's skin. If the latter is ever the case, just type "Go to hell, Billy" in your next response, so I'll know I'm being a jerk.



My point was NOBODY ASKED!!
rb446 used a quick calculation to decide he was 200hp down, and you commented that he was 10mph down from where he should be, all with no mention of track altitude, DA on the day the pass was ran...nothing.


I see this same type of assumption on thread after thread, by lots of different people, over and over and I find it reckless and irresponsible.

I was looking to put a big hemi in my car, got in touch with diablo and what an awesome guy! Took hours out of his day to explain a lot of things to me, then referred me to a motor that was for sale. I purchased the motor and have been working with it ever since. First converter was way off and slipped 1.3% in the top end, still went 177. Current converter drops 1000 rpm on the shift and slips 8.6%. We were racing in Misson BC Canada, on the first weekend in July. I believe the corrected DA is around 1500. The motor may need a little more timing and the motor is still rich.

Todd at goodwin completion is a busy guy and hard to get a hold of sometimes. They have been great with helping me get spare parts and also how to maintain this kind of motor. I love my Hemi's and the car gets a lot of attention where ever we go. Do i believe i could get the car to go 182.... yes. Could i get it go to go 189 lol NO!

I had planned on going faster with the car so maby its time for monte to put a couple systems on it!!!

Billy, you seem like this bothers you, would you like to talk about it?

If the engine that is for sale needs a cam change, what would that cam change intail? Pushrods, etc? It sounds as though the Goodwin name is for real. Thankd

One little point no one mentions about on the forums with regards to dyno numbers.
For comparison sake we all use "standard corrected power" figures, so everyone is (theoretically) talking apples to apples.
The problem is, the in-car performance doesn't get the benefit of the correction factor, and depending on the day and where you're racing, this can easily be a 10% difference.......just for atmospheric differences...... Not even taking into account the parasitic losses of driving the transmission, and any other engine driven components.
On a motor like the 1562hp Goodwin motor being discussed, that 10% loss equates to 156hp..........then add in any addition parasitic losses.

People often whine about how useless the dyno data is, but the way I see it, if you put together a new combination and don't know how much power it makes, how would you know how fast it "should" go?

Didn't mean to start a revolution here duds. Just wanted options about the engine. Peace out.

I can speak a bit to this particular Goodwin engine and combo in 499cudas car. He has been pulling his hair out changing things to make it pic up MPH. He races on many consider one of the fastest tracks in North America honestly. So I would say he is down at LEAST 10MPH. We have talked about it a lot. FWIW my old car and his are very very similar. His is 100+ pounds lighter than mine and I went 171 with "only" 1088hp. He is going 6mph faster with "way more power". He has changed a lot to this point trying to get it better. He does know what he is doing, well kinda but this thing sure seems down on power to me. I keep pleading with him to leak it down and do a compression test to see whats up if anything. Maybe the guy he got it from let it sit in a wet building for awhile and that caused some issue. I don't know. I do feel pretty damn confident it is not making the power claimed. Maybe it was worn out when he got it, maybe the cylinders are shot hell maybe a mouse crawled in and took out a piston I don't know. But I feel pretty confident in saying it aint making the power he was told...

Easy..... Just take it to a dyno you have good experiences with and make a few pulls.
If the cars performance and the new dyno numbers agree, you can stop trying to "fix" the car.

We have done that very thing on a few occasions where people had spent a lot of time and money trying to fix their car(to get the car to run what it should according to the supplied dyno info), when in the end, it was running as good as it was going to....... By the numbers we got from the motor.

Al, fast68: In you guys opinions what would the cam change have to be. More or less lift, duration etc. Just curious. They do make some high hp engines. Thanks

I did do a compression and we did leak it down, leak down was cold so I didn't pay much attention to it, but there wasn't anyone way out of wake. Leak down on an alum motor cold is tough anyways, compression was right on par! Have a lot of "stuff" going on right now and going to park the car for the rest of the season. After my wedding ill bring it out and make a game plan. I have considered EFI, but realistically I'll dyno the motor and then pull it apart. Make game plan from there. First couple outing's we had some converter issues, and were battling some carb gremlins. We have since then changed carbs, which has been little difference for power, and the converter seems to be perfect. We have had one race meet so far with a proper converter. Previous converter had 1.3% slip and was loosing 2200rpm on the shift. I wasn't really concerned about anything else until this was fixed. The one outing where we had it fixed, I was dealing with the rev limiter working in the grid box and a intake port that was leaking water.

When I first purchased the motor, a mutual friend told me to put it on a dyno "Mr.Bell". I wasn't really concered with it because the motor had 5 passes on it since it came off goodwins dyno.... This was a mistake on my part! But moving onward and upward...

To say that the MPH doesn't reflect Hp is crazy talk!

There is one more of these motors running in a car in Chicago area. I was told this motor made aprox 100 less hp then mine. His car weighed significantly less then mine and his 1/8 mile was 144mph......

I'm very pleased with my Goodwin motor. It's a 572 running in a 3550+ lbs 64 Dodge Polara . Todd is fantastic to work with. His service and support is incredible.

There were a couple of Goodwin powered cars in Chicago at the NMCA race. Owner seemed happy with the performance, both were Wedge powered cars. One 68 Cuda in NSS/A and a 64 Plymouth in C/FX. Both really nice cars.

I am not trying to bash anyone, just saying the numbers seem quite optimistic. As pointed out MPH and weight remove much of the mystery on how much power is there. I agree weather plays a huge affect on MPH as I have raced in all sorts of conditions and they have an affect. But we can pretty much discount that here as Mission is one of the faster tracks out there and have great air generally speaking.

I know you have a plan with yours 499. I have always said I do not not how you quantify a 1500hp trck pull deal, especially compared to what that means in a 1/4 mile pass. In the end I am confident it will get corrected. I am sure as we have discussed may need some changes to work ing a drag car.

Todd is a busy but nice guy! always was fair on price for parts and would return my emails. Kathy in the front is a pleasure to deal with and is super kind.

Glad to see others happy..............
Mid 3000 feet mid 80’s for temp don’t recall vapor gains, humidity or pressure this past weekend and ran 155 MPH, hell I had fun…….