Dyno Comparison: Bolt-on 6.1 Hemi Jeep SRT8 v v2 ECU/TCU Tuned MHP C63
12-05-2008, 04:46 AM
#1
Banned
Thread Starter
Join Date: Aug 2008
Posts: 2,587
Likes: 0
Received 0 Likes
on
0 Posts
'09 C63 AMG
Dyno Comparison: Bolt-on 6.1 Hemi Jeep SRT8 v v2 ECU/TCU Tuned MHP C63
Full mod list of both vehicles in my sig. SRT8 has substantially more mods (tests were done before the addition of the 90mm tb which I believe cost me midrange power/tq.
Anyway you can see the clear advantage 4 valves have over two. Length of powerband due to the heads flowing so much more air, smaller cams can be used making the motor less peaky.
12-05-2008, 07:45 AM
#2
MBWorld Fanatic!
1. The HP curves are almost identical here Andy.
2. Yes the C63, aka 4 valve has a SLIGHTLY flatter torque curve, emphasis SLIGHTLY
3. The mods you discussed could have caused this peaky TQ curve.
4. WHY are we even talking about DODGE products on this board
See yeah
2. Yes the C63, aka 4 valve has a SLIGHTLY flatter torque curve, emphasis SLIGHTLY
3. The mods you discussed could have caused this peaky TQ curve.
4. WHY are we even talking about DODGE products on this board
See yeah
12-05-2008, 01:47 PM
#3
Banned
Thread Starter
Join Date: Aug 2008
Posts: 2,587
Likes: 0
Received 0 Likes
on
0 Posts
'09 C63 AMG
To an extent where the 6.1 falls off due to not having enough cam and intake runners that are too long, emphasized by the 2v cylinder head design.
I'd call it more than slightly but it's a subjective call. Remember the 6.1 has full exhaust LT to tailpipe, ported intake manifold, CAI, ECU Tune, UD pulley to it's benefit vs just tuning for the C63. With like mods the 6.2 would crush it, as if it doesn't already.
Not so much. Bolt-ons do not cause peaky tq curves, cam swaps do.
Because until recently they came from the same company, and I thought the comparison of an American iteration vs a German one would be somewhat interesting to anyone that remotely enjoys vehicles on the whole. 
Thanks
2. Yes the C63, aka 4 valve has a SLIGHTLY flatter torque curve, emphasis SLIGHTLY
3. The mods you discussed could have caused this peaky TQ curve.
4. WHY are we even talking about DODGE products on this board
See yeah
See yeah
Thanks
12-05-2008, 05:36 PM
#5
MBWorld Fanatic!
To an extent where the 6.1 falls off due to not having enough cam and intake runners that are too long, emphasized by the 2v cylinder head design.
Agreed, 2v run out of steam on the upper end, but SHINE on the bottom
I'd call it more than slightly but it's a subjective call. Remember the 6.1 has full exhaust LT to tailpipe, ported intake manifold, CAI, ECU Tune, UD pulley to it's benefit vs just tuning for the C63. With like mods the 6.2 would crush it, as if it doesn't already.
The curves are NOT that much apart, hence my term SLIGHTLY
Not so much. Bolt-ons do not cause peaky tq curves, cam swaps do.
Which is why I used the word COULD, NOT DID. By the way, are you trying to say that bolting on a throttle body that is too big does NOT hurt the curve?
Because until recently they came from the same company, and I thought the comparison of an American iteration vs a German one would be somewhat interesting to anyone that remotely enjoys vehicles on the whole.
Thanks
Agreed, 2v run out of steam on the upper end, but SHINE on the bottom
I'd call it more than slightly but it's a subjective call. Remember the 6.1 has full exhaust LT to tailpipe, ported intake manifold, CAI, ECU Tune, UD pulley to it's benefit vs just tuning for the C63. With like mods the 6.2 would crush it, as if it doesn't already.
The curves are NOT that much apart, hence my term SLIGHTLY
Not so much. Bolt-ons do not cause peaky tq curves, cam swaps do.
Which is why I used the word COULD, NOT DID. By the way, are you trying to say that bolting on a throttle body that is too big does NOT hurt the curve?
Because until recently they came from the same company, and I thought the comparison of an American iteration vs a German one would be somewhat interesting to anyone that remotely enjoys vehicles on the whole.
Thanks
Enjoy my friend, don't want a pissing match here, just thought it was
See yeah
The following users liked this post:
JQuala (12-15-2017)
12-05-2008, 06:35 PM
#6
Banned
Thread Starter
Join Date: Aug 2008
Posts: 2,587
Likes: 0
Received 0 Likes
on
0 Posts
'09 C63 AMG
The curves are NOT that much apart, hence my term SLIGHTLY
Which is why I used the word COULD, NOT DID. By the way, are you trying to say that bolting on a throttle body that is too big does NOT hurt the curve?
Whoa, I like your credentials Andy, however I have been building engines for a few more years my friend and do enjoy ALL types. Heck, I have owned just about one of everything at some point in time. Just I like them in the appropriate boards/place.
Enjoy my friend, don't want a pissing match here, just thought it was
See yeah
Enjoy my friend, don't want a pissing match here, just thought it was
See yeah
Regardless if you're a fan of everything as you claim you shouldn't have an issue whatsoever. I have no idea who you are, but you assume a LOT in the last part of your post. Any world records? Anyway, have a nice day.
Thanks
Andy
Last edited by MHP; 12-05-2008 at 06:38 PM.
