SBC 427 Dyno Friday HP guesses
10-30-2014, 03:26 PM
#22
Team Owner
gkull- I have followed your threads for many years and have respect for you and the many folks who have helped me over the years. You seem to usually consider most cams as mild. For his application, assuming it is mostly for street use, what would you consider to be aggressive? (I am not looking to get into a huge discussion about cams here, plenty of those to go around, just curious)
The 220 cc heads have great flow numbers. Once you get over the high 230 duration @ .050 motors can start going up on compression. Like exceeding 10.5 up to near 11.0 once you get up in the high 240's you can exceed 11.0 on super unleaded of course these are roller cam numbers. higher compression makes a motor sound more radical.
10-30-2014, 04:28 PM
#25
Drifting
Yes. All my cams in a perfect world should go in straight up. Those with advance it is ground into them. With lifter bore angle, chain slop, and crank key way location all of this will affect cam timing. They all need to be checked for IO event and verify it.
10-30-2014, 05:28 PM
#26
Safety Car
Thread Starter
Man I aint gonna sleep . . . . I am just thinking and thinking how bad a$$ this will all be when done... I hope it does idle like the BB you posted Chris it almost idles like that now with my 350 which means very few people will question me when I say I only did a muffler change over the winter LMAO
10-30-2014, 05:37 PM
#27
Drifting
Man I aint gonna sleep . . . . I am just thinking and thinking how bad a$$ this will all be when done... I hope it does idle like the BB you posted Chris it almost idles like that now with my 350 which means very few people will question me when I say I only did a muffler change over the winter LMAO
Paul has a sound clip. It should sound just like his. His son said the idle note is sweet.
10-30-2014, 06:00 PM
#28
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I predict it will make kick-*** HP and bad-*** TQ!!! 
I wouldn't be able to sleep tonight either!!
I love how Straub's "tiny" hydraulic cams continues to prove the disbelievers wrong.
I wouldn't be able to sleep tonight either!!
I love how Straub's "tiny" hydraulic cams continues to prove the disbelievers wrong.
Last edited by 7t2vette; 10-30-2014 at 06:03 PM.
10-30-2014, 07:19 PM
#29
Safety Car
Thread Starter
And so the count down starts we are at 16 hours or less ...
I did here Paul's motor it sounded very good.. And his differential looked like it lost an argument with his motor LMAO
I did here Paul's motor it sounded very good.. And his differential looked like it lost an argument with his motor LMAO
10-31-2014, 01:09 AM
#30
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I cannot wait to get to the point where I can get mine on the dyno too. Have to find someone very experienced in EFI and Meth injection to get it all tuned and screaming 
)
It will be already installed so I need a chassis dyno.
)It will be already installed so I need a chassis dyno.
10-31-2014, 01:26 AM
#31
Race Director
I got off the dime and ordered a engine. Friday AM it will be run and tested.. So I will post results ..
AFR 220 heads 2.10 / 1.60
Titan Intake
(carb on dyno 950 quick fuel)
Dart block 3.85 stroke
Forged scat rods and crank
Forged pistons
10.5 compression
1.6 rockers
Straub cam
.611 .592 W/1.6rr 244 248 lob 109
Any one want to make a good guess what she will do on the engine dyno.
AFR 220 heads 2.10 / 1.60
Titan Intake
(carb on dyno 950 quick fuel)
Dart block 3.85 stroke
Forged scat rods and crank
Forged pistons
10.5 compression
1.6 rockers
Straub cam
.611 .592 W/1.6rr 244 248 lob 109
Any one want to make a good guess what she will do on the engine dyno.
I was 510hp at the rear wheels in a tko600... Which would put me at say around 650max.... So, I'm going to say 585:-). I think the .5 cr and the head work is the major factor
10-31-2014, 06:44 AM
#32
Safety Car
Thread Starter
Hmmmm this is fun.... Ok... Here are the differences I see... I am at 11:1 compression, my 220's are competition ported, I am fuil injected with controlled timing and AF... And a windage screen...
I was 510hp at the rear wheels in a tko600... Which would put me at say around 650max.... So, I'm going to say 585:-). I think the .5 cr and the head work is the major factor
I was 510hp at the rear wheels in a tko600... Which would put me at say around 650max.... So, I'm going to say 585:-). I think the .5 cr and the head work is the major factor
I am also fuel injected
I think .5 cr is not going to add more then single digits of hp .. And the head difference I am not so sure will matter as greatly as you think because as AFR shows 600 lift and down your heads only flow a few cfm more. So definitely not 65 hp worth of differences based on how we are each set up.I am concerned however that you are using such a high % of power loss from motor to wheels ,, 15% with a manual not 23% .. If that is correct your not making anything close to 650 hp and my motor will not break 600
10-31-2014, 09:00 AM
#34
Melting Slicks
My guess
575 hp and 535 tq.
10-31-2014, 09:18 AM
#36
Race Director
I am also fuel injected I think .5 cr is not going to add more then single digits of hp .. And the head difference I am not so sure will matter as greatly as you think because as AFR shows 600 lift and down your heads only flow a few cfm more. So definitely not 65 hp worth of differences based on how we are each set up.
I am concerned however that you are using such a high % of power loss from motor to wheels ,, 15% with a manual not 23% .. If that is correct your not making anything close to 650 hp and my motor will not break 600
I think .5 cr is not going to add more then single digits of hp .. And the head difference I am not so sure will matter as greatly as you think because as AFR shows 600 lift and down your heads only flow a few cfm more. So definitely not 65 hp worth of differences based on how we are each set up.I am concerned however that you are using such a high % of power loss from motor to wheels ,, 15% with a manual not 23% .. If that is correct your not making anything close to 650 hp and my motor will not break 600
10-31-2014, 11:16 AM
#37
Race Director
I am also fuel injected I think .5 cr is not going to add more then single digits of hp .. And the head difference I am not so sure will matter as greatly as you think because as AFR shows 600 lift and down your heads only flow a few cfm more. So definitely not 65 hp worth of differences based on how we are each set up.
I am concerned however that you are using such a high % of power loss from motor to wheels ,, 15% with a manual not 23% .. If that is correct your not making anything close to 650 hp and my motor will not break 600
I think .5 cr is not going to add more then single digits of hp .. And the head difference I am not so sure will matter as greatly as you think because as AFR shows 600 lift and down your heads only flow a few cfm more. So definitely not 65 hp worth of differences based on how we are each set up.I am concerned however that you are using such a high % of power loss from motor to wheels ,, 15% with a manual not 23% .. If that is correct your not making anything close to 650 hp and my motor will not break 600
we just did my sons C4 350... he was at 10.4 CR, and we took it to 11:1CR and ran another dyno, the tq went up from 335tq to 357.5tq
that was more than a 22lb tq gain from .6 boost in compression. we ran this test last month, it was a back to back test. he also had the heads ported and polished and port matched with long tube headers, thus similar to the competition porting I have, and the hp went from 339 to 389.2, thats a 50hp gain.....
350ci Edelbrock heads and efi intake on the C4
so for you I hope I am wrong... but yes, I think that will cost you 50hp.
So I am going to up my bet to 595hp
Last edited by pauldana; 10-31-2014 at 11:20 AM.
10-31-2014, 11:42 AM
#38
Race Director
They are not proving anything other than make less HP than a bigger cam. It was suggested that the OP use a smaller cam and he said no he wanted a bigger cam and chose to go with a cam the same as Pauldana.
10-31-2014, 11:48 AM
#39
Melting Slicks
