Refresh 1982 crossfire vette

Hi, guys does anyone flash proms anymore? I have a idle problem, at a light it wants to stall I'm wondering if this could be fixed by a prom flash? thanks guys.
 
http://garage.grumpysperformance.co...sfire-vette-won-t-run-right.10096/#post-39710

http://garage.grumpysperformance.co...ing-of-porting-an-x-fire-intake.144/#post-178

http://garage.grumpysperformance.com/index.php?threads/the-cross-ram-intake.623/#post-2154

http://garage.grumpysperformance.com/index.php?threads/a-few-cross-fire-tips.303/#post-987

http://garage.grumpysperformance.com/index.php?threads/installing-a-crossram-on-a-c4.511/#post-636

http://garage.grumpysperformance.com/index.php?threads/crossfire-sleeper.12732/page-2#post-65554

if you have a 1982-1984 c4 corvette
the swap to a RENEGADE intake for the O.E.M intake, simply because it flows significantly more air,
just the intake alone is easily worth about 20 hp, but if its matched to the correct cam and heads,
its going to be a noticeable improvement, over the results, you would potentially see with the O.E.M intake.
the originally use #624 heads are very restrictive, the original cams are no where close to ideal.
youll never get the full power potential from the RENEGADE untill you upgrade the cylinder heads and cam you use with that intake,
a commonly used and well documented combo (but certainly not your only options)
is the crane 114142

the OEM crossfire heads for 1984 are casting number 462624 76cc heads
462624 chevy head flow numbers
(these are the heads that came on the 1984 corvettes)
just a bit of info on those stock #624 head flow rates

.......intake....exhaust
.100..44..........41cfm
.200..101..........82cfm
.300.155..........125cfm
.400..182..........137cfm
.500..196..........140cfm

(THATS PATHETIC)

read this
https://www.hotrod.com/articles/ccrp-1209-eight-budget-sbc-head-shootout/



The 624 is a light weight version of the 882 head.,. The 624 is one of the worst that GM produced and not intended for high performance use.

every time I hear that MYTH,
( that starts out with, BUT THE 1984 MAKES GOBS OF TORQUE) I want to point out a few facts

http://www.stingray.nu/tips/tech84.htm

right from Chevy (1984 vette)
Net HP @ RPM 205 @ 5200
Net Torque @ RPM 290 @ 2800
Comp. Ratio 9.0:1


rencr.png

ren3.jpg

ren4.jpg


http://purplesagetradingpost.com/sumner/techinfo/heads1.html

http://garage.grumpysperformance.com/index.php?threads/got-a-cross-fire-corvette.640/#post-50502
while the dual throttle body cross fire intake design is comparatively restrictive and you'll benefit noticeably,
swapping to better heads and the renegade after market intake and a cam like a crane 114132 ,
theres always been a problem with many of these dual throttle body injection system simply being improperly adjusted and tuned,
Ive found most of the 1984 corvette pick up noticeable power through simply correctly tuning and balancing the throttle bodys
the stock engines O.E.M. power is PATHETIC compared to the corvettes true potential.
theres an easy 70-80 hp or more in upgrading the cam,heads and intake
now that might not sound impressive but its easily a 45% plus power increase
the stock engine barely exceeded 205hp and 290 ft lbs
reaching in excess of 330 hp and 350 ft lbs with correctly selected parts even retaining most of the original short block 350 is do-able,
upgrade to a higher compression 383 stroker assembly and , better heads,
intake and cam, and even retaining the dual throttle body renegade of offy intake,
400 hp plus is not that difficult

https://auto.howstuffworks.com/1984-corvette3.htm
 
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Hi, guys its been a while, I want to have the throttle bodies rebored and put in different injector. Whom ,would you suggest to rebore them and how do you get the injector in and out without messing them up. thanks . jac1892
 
Hi, guys its been a while, I want to have the throttle bodies rebored and put in different injector. Whom ,would you suggest to rebore them and how do you get the injector in and out without messing them up. thanks . jac1892
I don't know.
A good machinist friend if you have one.
I have one here. Bob specializes in 1 off projects.
 
The injectors should pull out using needle nose pliers.
Grab both electrical pins at the same time.
Twist and pull up.
 
Hi, guys ,This might have already been covered , but here it is . I have a old 400 c.i.d. block s.b.c., is it worth rebuild for street use? thanks
 
.IF the blocks in decent condition its a good place to start a mild performance build!
as usual either you need to take the block to a local car wash that has a customer pressure wand type spray car wash,
a big bottle of dawn dish detergent and a stiff bristle brush,
clean the block and very carefully inspect it, (many places won,t allow that, one reason I purchased my own pressure washer)
and use some accurate measuring tools to verify the bore size,
then soak it down with WD40 or the block will start flash rusting before you can drive it home,or,
have a decent local machine shop clean and inspect the block and sonic test it, thats the first step in any build
yes this can cost $100-$200 or so but if the blocks too be used its required and if the blocks cracked ,
or too thin in places you sure don,t want too dump hundreds into machine work on a defective block,
so its a required step, in either case.

http://garage.grumpysperformance.com/index.php?threads/block-prep.125/

http://garage.grumpysperformance.com/index.php?threads/cam-bearing-install-tools-install-info.1479/

http://garage.grumpysperformance.com/index.php?threads/engine-block-cylinder-wall-thickness.976/
 
Thanks, I have another question, what are the advantage of making a 377 out of the 400? I've seen this on you tube . thanks
 
the 377 with its shorter , 3.48" vs the 406 3.75" stroke and less displacement can operate at about 400 rpm higher and either engine
(377 or 406 will tend to make similar peak power, the 406 will tend to make enough more torque to , (if the cars properly set up drive train gearing )
have a marginal advantage if racing in a similar weight car, on the street the 406 would be my choice, if limited in a race class too...to lets say 7 lbs per cubic inch, the 377 wins marginally.
back in the later muscle car era (early 1970s) the 377 had an advantage in no longer has as the heads and cams available at that time could not fully and effectively feed the 406 ,
a set of ported fuelie heads and a z28 solid lifter cam, are not going to work well, compared to what is available currently
 
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Guys I've been reading up on 400 csb engines and people talk about running low coolant leaves for better cooling, is this true? Do you feel that 450 to 550 hp is do able and safe for street use? thanks
 
more coolant volume, moving faster, larger or more efficient coolant pumps, radiators with more surface area per square inch,radiators with larger and wider coolant passages, through a larger radiator surface area exposed to more air flow mass,have always resulted in more effective cooling, adding accessory , added trans fluid and oil coolers with powered fans that disperse the heat load to adjacent coolers from the O.E.M. radiator and adding longer oil filters, larger capacity transmission or engine oil pans also tend to increase cooling efficiency
youll find several myths on the internet.

read these links (CAREFULLY)
http://garage.grumpysperformance.com/index.php?threads/thoughts-on-cooling.149/

http://garage.grumpysperformance.co...il-cooler-increases-durability.176/#post-1237

http://garage.grumpysperformance.co...ing-system-flow-rates-and-heat-transfer.9880/

http://garage.grumpysperformance.co...sion-and-oil-cooler-increases-durability.176/

http://garage.grumpysperformance.com/index.php?threads/how-the-cooling-system-works-basics.853/

http://garage.grumpysperformance.co...-choose-an-electric-fan-in-4-easy-steps.7774/

http://garage.grumpysperformance.com/index.php?threads/aluminum-radiator-sources.755/

http://garage.grumpysperformance.com/index.php?threads/oil-system-mods-that-help.2187/

http://garage.grumpysperformance.com/index.php?threads/basic-info-on-your-v8-lube-system.52/

http://garage.grumpysperformance.co...ans-cooler-on-a-c4-corvette.10514/#post-70074
 
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