The great 5.3l vs 6.0l swap debate.

[ff_jeff]

heres where your comparison is wrong will show its same results. you take a 325 and run with this cam and those heads. you put the exact cam and heads on a 364. the cam and heads will now be tame on the 364 and probably wont if any gain HP over the 325 since the cam and heads were specially setup for the smaller motor. a larger motor like the 364 would much more benefit from a better choice of parts



as for my 4.8 vs larger motor. take a look at parish's 408 at the same psi level as my 4.8. same cam, same turbo, stock intakes, same exhaust... almost identical HP at the same psi level. the difference was TQ...cubes will never short you on TQ.... that is your real world comparision....



as for everything destroys the BB454 again your wrong. take an older 454 it doesn't compare one bit to the modern day 454. have to be little more clarified on that statement.




also granted ppl dont believe in dyno numbers and etc. but go look at hate dynolist on tech. you'll see 346s making more power then 408s with the same parts. perfect example. L92s on a 408 make no kind of power take a 377 with exact same heads and cam and it makes power.. a local 383 with a synergy cam and stock l92s made more power then a 408 with same cam and heads. both had same headers, both had same trannys both had same exhaust. both tuned by same guy both in camaros....the 383 car was much faster and stronger

OK george... A 408 with l92 heads doesn't make as much as a 383 with l92 heads? Why would that be? they both are essentially the same motor minus the bore and stroke. So what your telling us is that bigger cube lsx's are a waist of money? And as for the 454bb I was referring to the ss truck version... the one that would apply to us.
And as for your motor vs Parish's... you have an 88mm turbo right? didnt parish have a 76mm? Same psi doesn't = same airflow... you know that. Plus he made over 1000wheel tq and made it into the 10's with an auto. Your numbers were with a standard. On 14psi he made 637/716... what did you make? 699/555 at 16psi you gave up over 160wheel tq.
And as for the head/cam motor combo thing, It has been verified that a 5.7 with an asa cam puts down 380-400whp and a 4.8 with the same cam only makes about 315-325whp. Now this is with stock heads. With higher compression heads, you might see another 15whp... But thats not were the smaller motors lack, its all in the tq. 100tq is the difference. 100tq is a lot for .9 cubic inches.
And lastly the spell checker is free, its right above the smilies to the right. Peace brother...

[George C]

ok george... A 408 with l92 heads doesn't make as much as a 383 with l92 heads? Why would that be? they both are essentially the same motor minus the bore and stroke. So what your telling us is that bigger cube lsx's are a waist of money? And as for the 454bb I was referring to the ss truck version... the one that would apply to us.
And as for your motor vs Parish's... you have an 88mm turbo right? didnt parish have a 76mm? Same psi doesn't = same airflow... you know that. Plus he made over 1000wheel tq and made it into the 10's with an auto. Your numbers were with a standard.
And as for the head/cam motor combo thing, It has been verified that a 5.7 with an asa cam puts down 380-400whp and a 4.8 with the same cam only makes about 315-325whp. Now this is with stock heads. With higher compression heads, you might see another 15whp... But thats not were the smaller motors lack, its all in the tq. 100tq is the difference. 100tq is a lot for .9 cubic inches.
And lastly the spell checker is free, its right above the smilies to the right.

the 408 i spoke of parish had his pt88 on it. its the video on youtube of the dyno. as for auto and manual the percentage is there so equal power

i knew you were referring to the SS 454 and i said its nothing compared to the other ones which a 454 ls6 is stronger

the 383 and 408 with L92s. the results were better for the 383 cause the heads dont perform worth a damm with a 4" stroke and before you say 383s are 4" stroke. theres more then one way to achieve a 383....all bore is the way in this reference

never said cubes are a waste but saying same parts and the parts specific for one motor wont result in drastic results for other.

the H/C package for a 346 wont be ideal on a 408. a H/C package on a 408 wont be ideal on a 454 LSX

take alook at the dyno section on tech. see how many 408s lay down less then 500rwhp, then see how many 346s are making over 500rwhp. then look at the RWTQ between the two. you can spend 40hrs seeing all the comparisons.


as for your reference to the ASA. it was designed for the 346 not a 293. it wasnt ideal for a 293. same as heads. take alook at the summit book for reference and see the new TFS heads. they now have heads for the 4.8/5.3 then they have heads for the 5.7 and 6.3 then of course the 6.0/6.7 then the 427 class.

bigger cubes require bigger parts






so to sum this up the 5.3 the OP is speaking about given X cam and X heads can produce the same power as the 6.0 in question. [torque will be different] Chose the right Cam/ heads for the 6.0 and of course it will make more power then the 5.3

[ff_jeff]

Chose the right Cam/ heads for the 6.0 and of course it will make more power then the 5.3

exactly

[banker099]

Chose the right Cam/ heads for the 6.0 and of course it will make more power then the 5.3

there we have it....argument solved!

[George C]

there we have it....argument solved!

true but Jeffy started out saying same parts on both motors will make different numbers

[ff_jeff]

true but Jeffy started out saying same parts on both motors will make different numbers

they do... walks away

[banker099]

they do... walks away