Racing Insiders Podcast

QUESTIONS ASKED ON THE SHOW What rpm range does the 602 start to really make power? How much oil do you add to the 525? 4:11 ring and pinion vs the 4:86. Steve said the 4:11 is better to run than the other and if Steve could explain exactly what he has found in testing and how this really works? The Race fan vs GM steel 4 blade. On the Race fan website, it shows on a chart that the 3 blade moves m...

QUESTIONS ASKED ON THE SHOW Have u seen any increase in cheating in the 602 divisions recently? 602 crate with Holley 650 4 barrell. What is your first choice for a carburetor spacer? What is the best carb for a 602? What do u guys think best stock rocker arm is? Is it hard on motors going back n forth from e85 for one series. Then gas series rules for other races? Any advantage with a 4.11 rear e...

QUESTIONS ASKED ON THE SHOW Purchased a set of your 602 valve springs and there was a bag of intakes and a bag of exhaust’s. What is the difference? Matched at different rates? What carb would you recommend running on a 604 going in a street truck? How close are the chips in a MSDS to actual rpm on Tach? After how many races either from brand new or rebuild do when u do think is right to change va...

QUESTIONS ASKED ON THE SHOW Steve what is the magic durometer number for Hoosier tires or any example of good tire reading of a racing tire? Steve’s recommended valve spring Change on a 602 in a imca hobbystock that runs a Rochester 2 barrel stock exhaust manifolds with a 6200 chip? Which produces more HP e85 or chp, and which produces more torque? When using a holly 4412 on a 602 or 604 what rpm...

QUESTIONS ASKED ON THE SHOW What plug do you recommend for the 604? We run a 602 imca sportmod sealed crate. having issues with distributor moving on us after we run a few laps. also fuel pump keeps coming loose? Thinking of installing the crate muffler on our asphalt prolate. would I install one per side before y pipe or one 4" after y pipe? How often should you change spark plugs? I race cr...

QUESTIONS ASKED ON THE SHOW Steve, I have a pic of a white late model number 29 from 1991 Santa Rosa Speedway. Is that you? How long is the shelf life of e85 in a sealed drum? What’s the average price to rebuild a 602 these days? On the 604 engines there's two different part numbers for intake, is there a difference in them? Could you get tossed by tech for running a new part number piston in...

QUESTIONS ASKED ON THE SHOW Steve do y'all run a fuel pressure gage in the car? Or near the motor? What’s the best 4hole carb spacer for 604? What’s the best carb spacer for 602 running E85? Whats your opinion of 10-30 Driven oil Steve? Whatever happened to the Joe Gibbs oil?  Good or bad to run 15w40 oil in a 602? Steve if you have any advice I think I might look into tire pyrometer, do you u...

QUESTIONS ASKED ON THE SHOW Is walker air filters really better then all the rest? What does it mean when driver says his tires sealed up? When using pump E85 and testing it to make sure it is 85, do you recommend the KLOTZ UpFlow Fuel Lube? I changed my oil in my 602, Schafer 15/40 , had 3 races on the old oil and all winter storage. My concerns are the oil was brown and not what I remember from...

QUESTIONS ASKED ON THE SHOW What are the recommended spark plugs for GM602, and GM604? Recommended gap on spark plugs? Recommended carb spacer for GM602? Recommended carb spacer for GM604? When you tune on the dyno, do you believe in the sniffer for tuning or would you rather still read plugs for timing and fuel? Each week, Kate Dillon from Crate Insider and Steve Hendren from Hendren Racing Engin...

QUESTIONS ASKED ON THE SHOW What’s the cost to freshen a 604 now ? What hard parts get changed when freshen for 3300? What is being learned now that engines are dynoed with an O2 sensor on each header tube? I am curious what you guys consider to be most efficient alternator for 602 dirt application? Any guidance is very much appreciated. Thanks in advance! Any particular amperage? I currently have...

QUESTIONS ASKED ON THE SHOW Any dyno testing with conversions to 1.6 ratio rockers? 1/4ish mile paved ovals mostly is our tracks. And roller rockers are not allowed either. Any thoughts//advice? What fuel pressures do you recommend? Is there any hp gain going from 12volt to 16 volt on msd on a 604? I know you don't like the kevco evac deal, but I run an asphalt deal so the dirt isn't much...

QUESTIONS ASKED ON THE SHOW Best spark plugs? Each week, Kate Dillon from Crate Insider and Steve Hendren from Hendren Racing Engines go live on the  Crate Insider Facebook page  and  Crate Insider YouTube Channel  to chat about world events, random things, and to answer tech questions. To watch this podcast on Crate Insider's  YouTube channel , click  here .

QUESTIONS ASKED ON THE SHOW Spark Plug Indexing is it worth it? Do you recommend low drag bearings on all 4 wheels or just the front? On the gen 2 bert transmissions is the Crate guys getting them ballspline or slip yoke? On a 602, is there an advantage to using a lightweight flexplate? What are your thoughts on lightweight balancers on a 602. Is it a bolt on or part of the engine? And, is there a...

QUESTIONS ASKED ON THE SHOW what is your opinion on using 87 octane non ethanol fuel in a 602 crate motor? Also what octane booster I could use it up to 91 or 93? what are your thoughts on plug indexing? 602 crate Steve not asking you to reveal your secrets but what is your method of preparing and cleaning your tires? How many races should you get out of oil before changing? What is the best oil t...

QUESTIONS ASKED ON THE SHOW How important is shock rebound on the left front when running a chain limiter? How much is reliability affected on a 604 by running 6800 RPM vs. say 6600 or 6700? Do we get any extra dyno time if we bring a case of beer? Each week, Kate Dillon from Crate Insider and Steve Hendren from Hendren Racing Engines go live on the Crate Insider Facebook page and Crate Insider Yo...

QUESTIONS ASKED ON THE SHOW Do anti reversion muffler get rid of the need for an X pipe and how do you feel about running them in a class that uses exhaust manifolds? Thermostat or restrictor? I bought a set of 604 valve springs from you is one for the exhaust and another for the intake. Are they all the same? There is a mark at the top of eight of them and a mark at the bottom of eight of them? H...

QUESTIONS ASKED ON THE SHOW Can a guy get away with running a 1.6 rocker arm or a crate engine without pulling out the rocker stud? 602 Rush engine vs. 602 Dirtcar sealed engine. Opinions good or bad? Each week, Kate Dillon from Crate Insider and Steve Hendren from Hendren Racing Engines go live on the Crate Insider Facebook page and Crate Insider YouTube Channel to chat about world events, random...

QUESTIONS ASKED ON THE SHOW Is the profab mufflers that come with the headers is it the same ones as what y'all sale? Are the anti-reversion mufflers worth the investment? Whats your thoughts on Super Bowl carbs? would change jets if you're racing at different elevations? I have a Asphalt 604 late model. What do you think of a step cross over header. 1 1/2-1 5/8-1 3/4 with 3 1/2 collector? Best of...

QUESTIONS ASKED ON THE SHOW Do you have the newer 604 springs in stock Kate? Matched? What’s the best fuel filter for 602 on E85? Have you seen or ran the newer Holley 650's I believe they are a different center section? How long to freshen 604? What is the best water wetter to use, that really works? Do you have any dyno experience with a stepped wall carb spacer on a 602? How much Horsepower/tor...

QUESTIONS ASKED ON THE SHOW Do you need to re-shim your valve springs every time you change them? You do recommend checking matched springs after every race right? Any update on the new style 604 valve springs? Has there been enough testing to compare to the "Blue" springs as far as longevity? I run a thermostat with my 602 it has helped me tremendously on fuel consumption to get the car up to tem...

QUESTIONS ASKED ON THE SHOW what your price on a dynoed 604? Do you recommend running a return on the fuel line? Any difference between the wilds headers and the pro fab headers on a 604? On a 602/604 is running a 1” carburetor spacer recommend / beneficial or no spacer at all? Do you recommend a distributor on a 602 dirt late model? If so front or rear mounted? What price on a chassis dyno 602 mo...

The CARS Racing Show is this Friday and Saturday January 6-7! Come out and see all the new innovations for 2023!  CARS Racing Show in Hickory, NC this January 6-7th QUESTIONS ASKED ON THE SHOW Valve springs are not rated on seat pressure, but they are matched correct? Intake springs are different then the exhaust on a 602? Is the video about adjusting valve springs on a 604 on the Crate Insid...

QUESTIONS ASKED ON THE SHOW Steve have you ever messed with the Ford equivalent crate engine of the 602? I wonder why organizations don't allow it to run? Do plug wires make a difference on a 604? If so What’s the top three brands? Honorable Mentions: CARS Racing Show in Hickory, NC this January 6-7th ART'S Radiator Products Each week, Kate Dillon from Crate Insider and Steve Hendren from Hendren...

QUESTIONS ASKED ON THE SHOW If you store your car in heated area, how often should you start 602 604, and for how long and what rpm in off-season? What's your opinion on whether or not to run an alternator? Best oxygenated fuel “gas” for the 602? I have a really good spare fuel pump that makes 8.5 fuel psi. I want about 7. How can I tweet this pump or do I scrap it? Anything new for dirt racing at...

QUESTIONS ASKED ON THE SHOW Have you heard of using 1.3 rockers for engine break in? Is that just parts catalog companies trying to sell stuff you don't need? Do you feel that there is widespread use of Shannon Davis products or tec west? What was the Cars date? I understand the reason for higher rated caps, but would you still be comfortable with a 28-30 psi cap? Each week, Kate Dillon from Crate...