Anyone ever thought of or installed L05 heads on their 305?

Just wondering for a replacement scenario-
they are really cheap and larger vavles would seem to help.

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5 months and it hasn't broken down- a new record!

 

i cant remember what the L05 is...but im not sure the 305's bore can take much larger valves....seems i read that somewhere...but I could be completely wrong....anyone else?

 

Yeah, I don't think the bore of the 305 is beig enuf for the valves to open.

In tother words, the valves on the L05 heads are too far apart to fit inside the bore of the 305.

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'92 Astro, GM crate 350, Holley Pro-Jection Intake, MSD 6AL, 3.42's, 2.5" exhaust, Flowmaster 40 2 chamber, B&M 2nd stage shift kit, 255 60 R15 tires on AR-727's, Polished & Bored TBI, Custom EPROM in progress

 

they fit fine. the cobustion chamber is too big and the heads are not good in the first place. you're better off with 305 TPI heads.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

Or L98 Aluminum heads

But I'll assume we're talking budget here, i don't have the bucks for 'vette heads right now thats for sure.

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88 Camaro (The mighty LO3 SC!)
305TBI/700R4/2.73/125,XXX miles
10" Open Element and Flowmaster 80 seires
Bosch Platinum plugs
Double silicone Accel wires


Next up: headers and gears

 

What are the best buget heads for perforamce gain for the LO3?

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un4givin89


Poor Mans White Face Guages
MikeKey.net - Camaro Enthusiast

 

lo5 heads areent worthit.. i looked at the but to much mechine.. if your want better heads that are cheap.. get a set of 305 tpi heads and rebuld them... thats what im doing now no mechine work really and i picked up a set for 100 and im going to replace the vavle springs, and rocker arms and stem seals and put them on.. total cost about 225 or so. just my ideas for the budget minded person..

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91 camaro RS
- 305 TBI
Mods: Performer TBI intake, 1" TBI spacer, K+N, jet fan switch ,160 thermo,Accel control module, Jet Stage 2 chip, edelbrock TES headers, Compleate 3" Flowmaster exhaust, Edelbrock springs, KYB struts and shocks, 700R4 built by TSI, SLP tq converter, b+m trans cooler, white guage faces, megashifter..
next month: spohn LCA's and panhard rod, BMR relocation brackets,posi 323 , lt1 cam and new valve springs

 

Maybe cast iron L98 (B2L) heads would be a good choice?

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5 months and it hasn't broken down- a new record!

 

not unless you supercharge it. The chambers are so big your compression goes very low. The only heads that might make so much power that this wouldn't be a big deal are the Vortec L31 heads. Some guy has them on his LG4 here and is running low 14s or high 13s



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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

Wait a sec there, L31 heads have same cc and valve sizes as B2L heads.

With either you'd have to get them milled to avoid comp loss. At least with B2L heads, no new intake is required.

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5 months and it hasn't broken down- a new record!

 

What would the CR change to on an L03 after putting untouched L31 heads on?

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Cheston Phillips
'96 BBB Impala SS "ADIOSS" & '91 white Caprice 'n0n 9c1' w/L03
GM_TBI list

 

I think its about 8.0