deankxf 20,292 Posted May 22, 2020 3 hours ago, CHESTNUTXE said: i have been looking for this picture for weeks ,see the little black drive gear on the shaft what count is it ? maybe 6 cause with 2.92 my speedo using orange 20 is out big time,at 100kph it reads 74kph,i was under the impreesion i had a 8 driven gear but now i doubt it,there is a bigger blown up picture a few pages back. with My rule of guessing, i would go for an 18 tooth gear. that's IF the same rule applies to the FMX as it does to the BW boxes.. (1 tooth makes about 10% ish ) so going from 20 tooth to 18 tooth might be close.. BUT.. on My other rule.. which is more accurate.. is ask someone that's running a similar combo what they have 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted May 22, 2020 just did research xr to xb 6 teeth and top loader black 7 teeth,mine being a 1971 c6 but in a galaxy with 2.47 rear end im guessing,c6 in smaller cars like mustang with 3.50 or shorter up to 4.33 drag pack would have had a 8 tooth on shaft id say,gerg said that little black thing is a yolk seal,not speedo gear,at $50 a gear i want to get this right. Share this post Link to post Share on other sites
gerg 10,871 Posted May 22, 2020 just did research xr to xb 6 teeth and top loader black 7 teeth,mine being a 1971 c6 but in a galaxy with 2.47 rear end im guessing,c6 in smaller cars like mustang with 3.50 or shorter up to 4.33 drag pack would have had a 8 tooth on shaft id say,gerg said that little black thing is a yolk seal,not speedo gear,at $50 a gear i want to get this right.Nah wasn't me mate, I know nothing about these thingsSent from my CPH1903 using Tapatalk 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted May 23, 2020 Nah wasn't me mate, I know nothing about these thingsSent from my CPH1903 using TapatalkSorry it was gregaus said thats a rubber seal speedo drive is further up the shaftSent from my SM-G570Y using Tapatalk Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted May 23, 2020 Sorry it was gregaus said thats a rubber seal speedo drive is further up the shaftSent from my SM-G570Y using TapatalkOk i read some usa forums it dont matter if 6 or 7 or 8 teeth are machined onto shaft ,just take a reading with what you have atm then go up or down,dave n dean were right but seems im not alone with this c6 speedo problems plenty others are asking exactly what i am looking for how many teeth are machined onto outer shaft and it could be heaps of c6 variations truck/car/van,ect ect very annoying so i think i will grab a 17 or 18 speedo drive with 17 probly reading a tad fast but its better than reading a tad slow yeah ?Sent from my SM-G570Y using Tapatalk Share this post Link to post Share on other sites
deankxf 20,292 Posted May 23, 2020 1 hour ago, CHESTNUTXE said: if you are out 3 or 4 kmh at 100, just pull the needle off the speedo and put it forward or back about the same.. the only thing that won't be 100% then is the odometer trip meter, but they weren't accurate when new anyway typed in the wrong spot.. read above 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
gregaust 319 Posted May 23, 2020 The 8 tooth is the most common I have come across . 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
bear351c 10,270 Posted May 24, 2020 Get your speedo recalibrated. Most gauge/instrument shops can fix the "out by 10 kays issue". Install GPS speedo on your phone, drive a couple of kays at 60 on the speedo, look at phone, write down reading. Drive a couple of kays ay 80km/h, look at phone, same at 100, and at 120. 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted May 24, 2020 Get your speedo recalibrated. Most gauge/instrument shops can fix the "out by 10 kays issue". Install GPS speedo on your phone, drive a couple of kays at 60 on the speedo, look at phone, write down reading. Drive a couple of kays ay 80km/h, look at phone, same at 100, and at 120.Yes ive been using the gps speedo thing,another question some of the c4 c6 speedo drives have a shorter nose on them compared to others with a long one ,is there any reason for this as i thought it could be for cable operation transducer up to xc as xd xe had the normal type im used to ? The 20 orange im using has the long nose on it but the yellow 18 on e bay has the short nose or spigotSent from my SM-G570Y using Tapatalk Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 24, 2020 Yes ive been using the gps speedo thing,another question some of the c4 c6 speedo drives have a shorter nose on them compared to others with a long one ,is there any reason for this as i thought it could be for cable operation transducer up to xc as xd xe had the normal type im used to ? The 20 orange im using has the long nose on it but the yellow 18 on e bay has the short nose or spigotSent from my SM-G570Y using TapatalkThis block has so many things cast on it probly the most ive ever seenSent from my SM-G570Y using Tapatalk Share this post Link to post Share on other sites
gerg 10,871 Posted July 24, 2020 That F is probably from an engine reco mob. That's the square pad that makes it a "square" block, vs a "D". Likely a GF block, if you look next to the oil sender port you will see the foundry mark. Sent from my CPH1903 using Tapatalk 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 24, 2020 That F is probably from an engine reco mob. That's the square pad that makes it a "square" block, vs a "D". Likely a GF block, if you look next to the oil sender port you will see the foundry mark. Sent from my CPH1903 using Tapatalk Has cf mark Sent from my SM-G570Y using Tapatalk Share this post Link to post Share on other sites
gerg 10,871 Posted July 24, 2020 I also read that early Aussie blocks used US molds. So the Cf may still be there despite being cast here.Sent from my CPH1903 using Tapatalk 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted July 24, 2020 Your machinist will know by how hard the iron is.Sent from my CPH1903 using Tapatalk 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted July 24, 2020 Any date code in the casting? Sent from my CPH1903 using Tapatalk 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 24, 2020 Your machinist will know by how hard the iron is.Sent from my CPH1903 using TapatalkI no this is the ruffest casting i have ever seen on the outside of a block but all is good Sent from my SM-G570Y using Tapatalk Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 24, 2020 I no this is the ruffest casting i have ever seen on the outside of a block but all is good Sent from my SM-G570Y using TapatalkYes july 77 its in goldfinger threadSent from my SM-G570Y using Tapatalk 1 gerg reacted to this Share this post Link to post Share on other sites
gerg 10,871 Posted July 24, 2020 Then it will be locally cast. Anything cast after 74 will be from here. Should be a solid lump with minimal core shiftSent from my CPH1903 using Tapatalk 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 24, 2020 Then it will be locally cast. Anything cast after 74 will be from here. Should be a solid lump with minimal core shiftSent from my CPH1903 using TapatalkBloody rain and heaps of it,good for indoor work eg building 351c 1st thing we need to do is put the cam tunnel plug in the ass end and the 2 plugs cause ya cant get to em on the engine standSent from my SM-G570Y using Tapatalk 1 deankxf reacted to this Share this post Link to post Share on other sites
deankxf 20,292 Posted July 24, 2020 no rain in Melbourne, just near freezing min to top of 13 deg.. not ideal for motivation that's for sure. 1 CHESTNUTXE reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 24, 2020 no rain in Melbourne, just near freezing min to top of 13 deg.. not ideal for motivation that's for sure.Ok thats done and welsh plugs and gallery plugs are in and the baby hyd stage 1 is in not doing the camplate up yet cause the crow chain has a shim that comes with itSent from my SM-G570Y using Tapatalk 1 1 deankxf and gerg reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 25, 2020 next put the pistons in. Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 25, 2020 next put the pistons in.PicSent from my SM-G570Y using Tapatalk 1 deankxf reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 25, 2020 PicSent from my SM-G570Y using TapatalkAlso managed to put the heater hose pipe in and switch that was destined for the 400 but in she goes now lets take a look at the 76da 302c manifold the closed in secondary was to keep air speed up compared to the 351c manifold but on a near std engine it will be fine i have run these on many a five 1 ,besides i only paid 30bux for it and the vaccum tree is worth that alone only other choice is the pro comp weiand copy at 169bux but its a single plane ,vloody rain is belting down here and lucky i got 99%of paintwork done on the car good time to screw the engine together but i have no heads over last 3 months been looking for a set of open chamber 2vs but none have come up in the gold coast area.Sent from my SM-G570Y using Tapatalk 1 1 deankxf and gerg reacted to this Share this post Link to post Share on other sites
CHESTNUTXE 7,312 Posted July 26, 2020 after spending a few hrs on the manifold and air cleaner i got em cleaned and painted the argent silver base coat and tomorrow get some more clear will enchance them even more,manifold looks choice now. Share this post Link to post Share on other sites