EFI Head Volume

Tue Apr 6 04:08:07 GMT 1999

My understanding is that both the late model cast iron & corvette heads 
have the same cc'c, since (to the best of my knoweldge) the 2 differences 
between these 2 engines is the head material (port shape as well) and I 
think exhaust manifolds where the vette got SS header and the iron head 
engine got cast iron exhaust manifolds.
----------
From: 	Shannen Durphey[SMTP:shannen at grolen.com]
Sent: 	April 5, 1999 8:28 PM
To: 	diy_efi at esl.eng.ohio-state.edu
Subject: 	Re: EFI Head Volume

I thought the aluminum vette heads and the early powerpack heads were
the only ones with chambers that small.
Any others?
Shannen

Mark Romans wrote:
>
> The stock cast iron head is 58.5?  Whoa, I thought it would have a bigger
> chamber than that.  Thanks for the info.
>
> Also quench area is critical in preventing pre-ignition so he would 
rather
> increase the combustion chamber volume than shim the head up.  Thanks 
again.
> Mark
> -----Original Message-----
> From: Marc Piccioni <mpiccioni at attcanada.net>
> To: 'diy_efi at esl.eng.ohio-state.edu' <diy_efi at esl.eng.ohio-state.edu>
> Date: Sunday, April 04, 1999 9:46 AM
> Subject: RE: EFI Head Volume
>
> >The head cc's should be 58.5 if the heads have not been cut. One 
possible
> >method (depending on how much boost he wants to run) is to use Fel-Pro's
> >head save gasket shim, it adds ~0.040" in thickness which roughly
> >translates into ~ 0.8 -> 1.0 drop in C.R. This would save a bunch of $$$ 
on
> >AL heads if that is what he would like to do.........
> >
> >/Marc
> >
> >----------
> >From: Mark Romans[SMTP:romans at pacbell.net]
> >Sent: April 4, 1999 12:45 AM
> >To: diy_efi at esl.eng.ohio-state.edu; EFI
> >Subject: EFI Head Volume
> >
> >I have a friend who has an 89 Firebird 5.7 w/tpi and a Vortech and he 
has
> >the stock cast iron heads.  (No casting #) and we are trying to 
determine
> >what the stock head combustion chamber volume is.  He wants to go to
> >aluminum heads and drop his compression to 8.0-8.5 to one range.  Anyone
> >know what the stock cast iron L98 F-Body app combustion chamber CC's 
are?
> >Thanks.  Mark
> >
> >
> >
> >
> >

begin 600 WINMAIL.DAT
M>)\^(A4$`0:0" `$```````!``$``0>0!@`(````Y 0```````#H``$-@ 0`
M`@````(``@`!!) &`% !```!````# ````,``# #````"P`/#@`````"`?\/
M`0```%L`````````@2L?I+ZC$!F=;@#=`0]4`@````!D:7E?969I0&5S;"YE
M;F<N;VAI;RUS=&%T92YE9'4`4TU44 !D:7E?969I0&5S;"YE;F<N;VAI;RUS
M=&%T92YE9'4``!X``C !````!0```%--5% `````'@`#, $````?````9&EY
M7V5F:4!E<VPN96YG+F]H:6\M<W1A=&4N961U```#`!4,`0````,`_@\&````
M'@`!, $````A````)V1I>5]E9FE 97-L+F5N9RYO:&EO+7-T871E+F5D=2<`
M`````@$+, $````D````4TU44#I$25E?149)0$533"Y%3D<N3TA)3RU35$%4
M12Y%1%4``P``.0`````+`$ Z`0````(!]@\!````! ````````/G10$(@ <`
M& ```$E032Y-:6-R;W-O9G0 at 36%I;"Y.;W1E`#$(`02 `0`4````4D4Z($5&
M22!(96%D(%9O;'5M90#O!0$%@ ,`#@```,\'! `%`!8`"0`H``$`)P$!(( #
M``X```#/!P0`!0`6``4`,0`!`"P!`0F `0`A````.#@U,D0X,S)!,T5"1#(Q
M,4)%.4,T-#0U-3,U-# P,# `\ 8!`Y &`- '```2````"P`C```````#`"8`
M``````L`*0```````P`V``````! `#D`8#W"2N-_O@$>`' ``0```!0```!2
M13H at 149)($AE860 at 5F]L=6UE``(!<0`!````%@````&^?^-*NC+84HGKHQ'2
MOIQ$15-4`````!X`'@P!````!0```%--5% `````'@`?# $````8````;7!I
M8V-I;VYI0&%T=&-A;F%D82YN970``P`&$'(20]4#``<0,P8``!X`"! !````
M90```$U954Y$15)35$%.1$E.1TE35$A!5$)/5$A42$5,051%34]$14Q#05-4
M25)/3B9#3U)6151414A%04132$%6151(15-!345#0T,L4TE.0T4H5$]42$5"
M15-43T9-64M.3U=%3$0``````@$)$ $```!7!@``4P8``,$+``!,6D9U5*(N
MI_\`"@$/`A4"J 7K`H,`4 +R"0(`8V@*P'-E=#(W!@`&PP*#,@/%`@!P<D)Q
M$>)S=&5M`H,SMP+D!Q,"@S02S!3%?0J BPC/"=D[%Y\R-34"@ <*@0VQ"V!N
M9S$P,V\44 L*%%$+\F,`0 70>;@@=6X$@1/ `'!D"X#D9R $`"!T$8 %0 ;@
MLQW ';%E( M@$] @!&)Y`R!C81/ '8 #8 .@)CL?0 6P=A' 'L$><&%DSP0@
M$8 @0!Y3<V$'@!] L&,G8RPA@ N 8QZ :"AT;QY38@>0!4!OAF8>X!R0:VYO
M=Q\@\&1G92D>4Q'@'4 -T-\$D GP(G $(",@="0`"?#O'E(1L"2Q"?!G"X '
MD1V3WR"$'N >L0<B(I!P%T$A@*T1@' >@!]@("0!;"1 at 61TA($D=L0N :R:0
M>'T1@'4?<0.!!I &\"#1=^\><!>@'E, at 1&<>( 8`!?#_(*($D"FS'F(?HR>3
M)J0LDPL?6"J/+ at J+;&DQ.((P`M%I+3$T- WPYPS0,H,+63$V"J #8!/0^F,%
M0"TTIPJ',UL,,#0F^D8#83HUKC0F#((&`!& 5FXFX . at 1 AP<!YP><!;4TU4
M4#HHT3F2+D )P ;P"? N!:!M7;\U3S9=!F ",#>/.)M!$U E`Q$U(B Q.4"@
M(#C .C(X(%!-.^\V79Q4;SXO.)L=0'E?#< D:4 'D&PN)J$N;SDJ,&\M'0$3
MT$8`9'7C05\\_G5B:C1A0W\XFZ1294F at 148J`$@GHCI6!O!U!X *A3$=,S:?
M,R<;U30F*@((8&=H!4#_'F('0$R "X!,@"PU(*0MAOD at L')L') H@"0`.@``
MT/\J8""D4N%,IAYB`B!2D0(@?P>1`_ >,1%Q!M <X1VT<^<`P"F ,09!;E3A
M'F$1H.X_"H4Y94R\30K *F (`VLI030R. at J%/DT66U!4/R%B(K!3,1]8)Y,=
MD34X0"XU/R @5T_ at 87\B($^X56 I4 A@)" @]&'I'@!I9R1 <EKG5:4=LKLF
M`AW at +EX07 ``<&L$(#\"$%14"X "$#$&6UE!;/IS(L!Q"E B8!Y "L @L/,=
M@@4!=&D?4 ,@"X!2L-\7H"! `C =4F;!+6! `P#?9C ?P63A'G%?9'(=X"NQ
MOV.G(E%ED291'F([H6(JP?MH`F$F=DQC890HT =P)TCD=7!B.&%G"W%CF%G"
MNV.G-*-/!1 FP2A!30>0OR&0)$ T^EM0-T19P6-!( 5F0&-H`6D@/&UP-7,%
M0!W@=!]0<+!D8;(N)N!T/EMX0V$G15^]1FLG<W!U_T9K=0A$'K%G2:!),!S 
M87DB($ $,,(T0'4Y.C0V%+!!1O-;4$DW4D5+KV.O6T!<`O\GDR'A!" HT%]S
M(R!=LQV /R. )U8 at Y2/@'?$EXF-UW6(A3R[A*( $$&D"8'\([CX'@$_1)\ H
M#; I`!TT]RXB(_ >X'5E40;@A& %0-MH<@!P=!VA(L!R'+ D8"\=DB+ *L >
M@$8?("U0?P-@@/!_J">3(9 A(6Y@<WYK$<!LHR(@7S$@P"#1?N0P+GO ,")F
M at BHA4S#_)N$K at F9 'D #8% !4I!_J'YT:0``@!ZB)P$","+ ?M5[L"Y!$"U;
M4#&,H"30Q0-@<&:"0RY28C!<`'\=D5]DBN-@$1RP95$C<23GDY!4H7^H04P@
ME8(3'>&_D@(=TFAW,>"+8(@R9&. ]Y=6?ZA_J"]RHI?O@!$TKY^ $7)'6?8Z
M5 -C<T!3$?\C(%:Q=-$[UH 1/>1 !'O6_#$R?&"!\'RI@#!#87@/?49K.WX2
MGIE)1GXOF9\^_RH`7\4#4 B0*=$KH&A1*3'5`Y$X0,!&'Z!E8# +(,E 4"XW
M*5 O='.@*;/_8!!,4 `@!9!E82G1)V(?8)^.J5P?+C0P\%X0*$XBP'L?4AU2
M(RFD) !E<AVP<OYY'5*7`A' !)!0P83)E=/_K)B A&K?:^8$`&(QI7"'V/\L
MH(@Q?ZA0EU&(D1.1\CNAGV;!A'$?P2*Q7= P+8'2_R*Q50%H\1J at 1N!>$%=1
M50&??Z at CTI7$K)\?P4PY01#X1BU"!' <D"CPD4"S#_D%P$-#@/%E at 5?V@!-B
M at O]B,6]+F'G";\-_3/A-+S,GO15B,A*P-"8*A1;!`,D```,`$! ``````P`1
M$ H```! ``<P@,$'P>)_O@% ``@P@,$'P>)_O@$>`#T``0````4```!213H@
&``````&,
`
end