427 LS7 Buildup Pics!! (25+ pics)
08-25-2006 | 08:34 PM
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427 LS7 Buildup Pics!! (25+ pics) Ended up doing a customer a rush job as his other shop failed on him bigtime. He pulled out the block (only thing they got for him) last week the customer and I scrambled around and got a crank, rods, pistons, rings, ARP studs, cometics etc.... I allready had the LS7 heads... So he dropped it off last Saturday... On monday I had the block dropped off for machining and the rotating went in for balancing as well. Well I got it all back in 24hrs and started the build on Wednesday and finished the motor this morning...Here they are!
09-02-2006 | 10:07 AM
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Here's a few quotes from the owner. Looks like it made somewhere between 565 & 575 RWHP with a 12-15% correction factor according to the owner of the dyno. He's gonna try to get it on a Dynojet this week coming up
Originally Posted by Haans249
I get there, the guy who owns the Mustand Dyno wasn't there, although my vehicle was already on the rollers. Then the owner of the shop shows me some stuff and says..."Alright, have fun" and starts walking away. So, to make a long story short....I had to dyno my car, ALONE. First time to the dyno, and I have to run the dyno myself.
Did a little tuning and started to make some power runs. On my last power run, AFR was a tad rich (jumped between 11.8-12.3), but it pulled 497rwhp 435ftlbs. Now, this sounds horribly low and I thought the same thing...but then I asked the owner of the shop about it and he said their dyno is setup for tuning and will not give the "dyno queen" numbers people look for. For comparisons sake, another TA there, with a 427ci with ETP C5R 255 heads w/sheetmetal intake, true duals exh, made "only" 480hp to the wheels on their dyno. My exh is still your standard y-pipe setup with a flowmaster muffler, so that is choking the car down ALOT. So, add a dual exh setup, it'll probably see another 20hp/15trq conservatively on their dyno. So, I think my car did REALLY well for the setup. It still has a little work left to be done, but add that exh, touch up the tune and we're talking probably 520-530hp on their dyno which translates to 587hp/500 trq on a dynojet which I'd have to say, is pretty f'in nice...=D
Dyno graph inclose.
Thanks goes out to Jason at Katech, he stopped by the shop (which is across the street) to see how she was doing, and helped me out a little with the dyno. I appreciate it!
Best Regards,
Adrian
PS...Gotta love that FLAT trq curve =)
Did a little tuning and started to make some power runs. On my last power run, AFR was a tad rich (jumped between 11.8-12.3), but it pulled 497rwhp 435ftlbs. Now, this sounds horribly low and I thought the same thing...but then I asked the owner of the shop about it and he said their dyno is setup for tuning and will not give the "dyno queen" numbers people look for. For comparisons sake, another TA there, with a 427ci with ETP C5R 255 heads w/sheetmetal intake, true duals exh, made "only" 480hp to the wheels on their dyno. My exh is still your standard y-pipe setup with a flowmaster muffler, so that is choking the car down ALOT. So, add a dual exh setup, it'll probably see another 20hp/15trq conservatively on their dyno. So, I think my car did REALLY well for the setup. It still has a little work left to be done, but add that exh, touch up the tune and we're talking probably 520-530hp on their dyno which translates to 587hp/500 trq on a dynojet which I'd have to say, is pretty f'in nice...=D
Dyno graph inclose.
Thanks goes out to Jason at Katech, he stopped by the shop (which is across the street) to see how she was doing, and helped me out a little with the dyno. I appreciate it!
Best Regards,
Adrian
PS...Gotta love that FLAT trq curve =)
Last edited by SLED28; 09-03-2006 at 06:51 PM.
09-03-2006 | 09:22 AM
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I am looking at going this route or building up a 6.0 iron 408. So since you have now done this what kind of money would someone be looking at to have this set up. I know it will be more but just wondering how much more.
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09-03-2006 | 03:02 PM
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Yep, don't matter what RPM your at, you can always say 500tq (after corr factor). Might make it to a dynojet as it still needs tuning 11.8-12.3:1 AFR is a way rich! 
09-03-2006 | 03:44 PM
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Originally Posted by Hmmmm!
That is 1 flat tq curve. Is that making 440@2500 to 6500 rpm?If it is no wonder that thing pulls like a ****.
If you look at the scale it is measured in time, not RPM. It would be interesting to see this graph in a typical format, that shows rpm or mph. I have never seen one posted with a time scale. The torque is flat but for all we know it is from 4000-7000 rpm.
It will be interesting to see the results from a Dynojet, I'm sure they will be good though, instead of just speculating and interpolating.
Rampant
09-03-2006 | 05:01 PM
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Originally Posted by SLED28
I think it peaked at 6500 so, if you count back, it looks like 2500rpm... I think those lines are close to 500rpm each.
There is no possible way to work out rpm. If it was mph and you knew the gears, tire and so on it could be calculated. I'm surprised that it would be tuned this way as you have no refernce as to where to make changes in the program. Maybe your customer can get a print out with rpm shown.
Like I said I look forward to a proper graph that does not leave things so vague. Better yet if it is a Dynojet it will show the truer comparison.
The track will be the truest test as dynos are mostly a tuning tool anyway.
Rampant
09-03-2006 | 05:24 PM
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Originally Posted by RAMPANT
If you read it Sled it says quite clearly it is measured in time (secs) The pull could have been started at 5000rpm, there is absolutley no way of knowing based on this graph.
There is no possible way to work out rpm. If it was mph and you knew the gears, tire and so on it could be calculated. I'm surprised that it would be tuned this way as you have no refernce as to where to make changes in the program. Maybe your customer can get a print out with rpm shown.
Like I said I look forward to a proper graph that does not leave things so vague. Better yet if it is a Dynojet it will show the truer comparison.
The track will be the truest test as dynos are mostly a tuning tool anyway.
Rampant
There is no possible way to work out rpm. If it was mph and you knew the gears, tire and so on it could be calculated. I'm surprised that it would be tuned this way as you have no refernce as to where to make changes in the program. Maybe your customer can get a print out with rpm shown.
Like I said I look forward to a proper graph that does not leave things so vague. Better yet if it is a Dynojet it will show the truer comparison.
The track will be the truest test as dynos are mostly a tuning tool anyway.
Rampant
When we put on a dual exhaust equivalent to a corvette exhaust, there will be an easy 25rw gain there, nevermind it was not even knock retarding yet, maybe 10-15 rwhp more left in the tune alone now.
This 427 will go 600rwhp after these things mentioned, but for now the customer is MORE then happy with the stupid power its making!!
Last edited by SLED28; 09-03-2006 at 10:26 PM.
09-03-2006 | 05:46 PM
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I was more commenting on the 440lb/ft@2500 I highly doubt it could achieve this with the big cam it has in it and the intake runner volumes of the LS7 head. Like I said before, I'm sure it will make some stout power, but stating that kind of torque down that low without proper documentation is misleading.
I'm assuming it is the 242/255 one mentioned earlier with the .620+lift.
Thats all. I just want to see the real numbers, not speculative ones. I hope you are right. If you are you will have built a combination like no other can.
Rampant
I'm assuming it is the 242/255 one mentioned earlier with the .620+lift.
Thats all. I just want to see the real numbers, not speculative ones. I hope you are right. If you are you will have built a combination like no other can.
Rampant
09-03-2006 | 06:13 PM
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Dale there's nothing hard to beleive here. This motor has every trick in the book.
Are you saying Jason from Katech is gonna stretch the truth for me? I'll get the owner on here tonight and even Jason if you'd like.
FWIW, I made 500rwhp /615rwtq N/A with my 396 LT1! It only had a 3.875 stroke, not 4.00" stroke! Don't forget this 427 is a 11.25:1 motor too!
Are you saying Jason from Katech is gonna stretch the truth for me? I'll get the owner on here tonight and even Jason if you'd like.
FWIW, I made 500rwhp /615rwtq N/A with my 396 LT1! It only had a 3.875 stroke, not 4.00" stroke! Don't forget this 427 is a 11.25:1 motor too!
09-03-2006 | 06:29 PM
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Originally Posted by SLED28
Dale there's nothing hard to beleive here. This motor has every trick in the book.
Are you saying Jason from Katech is gonna stretch the truth for me? I'll get the owner on here tonight and even Jason if you'd like.
FWIW, I made 500rwhp /615rwtq N/A with my 396 LT1! It only had a 3.875 stroke, not 4.00" stroke! Don't forget this 427 is a 11.25:1 motor too!
Are you saying Jason from Katech is gonna stretch the truth for me? I'll get the owner on here tonight and even Jason if you'd like.
FWIW, I made 500rwhp /615rwtq N/A with my 396 LT1! It only had a 3.875 stroke, not 4.00" stroke! Don't forget this 427 is a 11.25:1 motor too!
Just post a real dyno graph from a DynoJet showing RPM. Not that there is anything wrong with a Mustang dyno, it is just not as common as the dynojets to use for a fair comparison.
You did assemble my motor too Sled, so I know what your capabilites are.
Rampant
09-03-2006 | 06:42 PM
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Yep gotta love convertor flash. Made 615 at 2000rpms!!! Cam was 260/270 112 and idled at 1000rpms. It was 11:1 compression 
I would like to keep focused on this 427 please!
Dale check this out, that is why the dyno graph is messed, the owner of the dyno wasnt even there. Haas249 has never seen a dyno before, nevermind tuning and running it yourself! He did very good. I'll send him in here.
https://ls1tech.com/forums/showpost....&postcount=136
Also the problem is he is running out of time, heading to Iraq in a week, so he is very busy right now I'm sure.
He's going to try to get to W2W's dyno this week. But for now all we can go by is between 10-15% to compare it. Lets go in the middle at 12.5%. It is common with GM LS7 heads to make 600RWHP+ you know, and soon even Canada!!!
I would like to keep focused on this 427 please!
Dale check this out, that is why the dyno graph is messed, the owner of the dyno wasnt even there. Haas249 has never seen a dyno before, nevermind tuning and running it yourself! He did very good. I'll send him in here.
https://ls1tech.com/forums/showpost....&postcount=136
Also the problem is he is running out of time, heading to Iraq in a week, so he is very busy right now I'm sure.
He's going to try to get to W2W's dyno this week. But for now all we can go by is between 10-15% to compare it. Lets go in the middle at 12.5%. It is common with GM LS7 heads to make 600RWHP+ you know, and soon even Canada!!!
Last edited by SLED28; 09-03-2006 at 06:50 PM.